This is C$++$ programing question Declare and implement two member functions and a global function that will change the state of a Train object. These functions will NOT change the state of a Train object if it is in a safe empty state. Note: Review the testing program and the sample output in order to understand the behaviour of these three functions. The member function loadPeople changes the number of people on a train. The value of the input parameter is used to increase or decrease the number of people on a train. It must make sure that the number of people will not be negative or exceed MAX$\_$PEOPLE. It returns true if the operation succeeds. It returns false if the Train object is in a safe empty state. The member function changeSpeed changes the speed of a train. The value of the input parameter is used to increase or decrease the speed of a train. It must make sure that the speed of a train will not be negative or exceed MAX$\_$SPEED. It returns true if the operation succeeds. It returns false if the Train object is in a safe empty state. A global function transfer moves as many passengers as possible from the second Train to the first Train. It has two parameters $($first$,$ second$)$ that reference two Train objects. The function must make sure that the number of people on both Train objects will not be negative or exceed MAX$\_$PEOPLE. It returns the number of people that have been moved to the first Train. It returns $-1$ if any of the Train objects is in a safe empty state. Testing Program #include #include #include using namespace std; #include "Train.h$"$ using namespace seneca; int main$()\{$ Train trains$[3]$; trains$[1].$set$("$Bullet Train", $100,245\mathrm{.}95)$; trains$[2].$set$("$VIA Rail Abitibi", $250,115\mathrm{.}95)$; trains$[0]=$ trains$[1]$; $//$ Watch out! cout $<<"----------------------------------------"<<$ endl; cout $<<"1.$ Testing changeSpeed." $<<$ endl; cout $<<"----------------------------------------"<<$ endl; trains$[1].$changeSpeed$(15)$; trains$[2].$changeSpeed$(-30)$; trains$[1].$display$()$; trains$[2].$display$()$; trains$[1].$changeSpeed$(500)$; trains$[2].$changeSpeed$(-600)$; trains$[1].$display$()$; trains$[2].$display$()$; cout $<<"----------------------------------------"<<$ endl $<<$ endl; cout $<<"----------------------------------------"<<$ endl; cout $<<"2.$ Testing loadPeople." $<<$ endl; cout $<<"----------------------------------------"<<$ endl; trains$[1].$loadPeople$(101)$; trains$[2].$loadPeople$(-55)$; trains$[1].$display$()$; trains$[2].$display$()$; trains$[1].$loadPeople$(1500)$; trains$[2].$loadPeople$(-2000)$; trains$[1].$display$()$; trains$[2].$display$()$; cout $<<"----------------------------------------"<<$ endl $<<$ endl; cout $<<"----------------------------------------"<<$ endl; cout $<<"3.$ Testing transfer." $<<$ endl; cout $<<"----------------------------------------"<<$ endl; transfer$($trains$[1],$ trains$[2])$; trains$[1].$display$()$; trains$[2].$display$()$; trains$[2].$loadPeople$(955)$; transfer$($trains$[2],$ trains$[0])$; trains$[2].$display$()$; trains$[0].$display$()$; $//$ Watch out! cout $<<"----------------------------------------"<<$ endl $<<$ endl; cout $<<"----------------------------------------"<<$ endl; cout $<<"4.$ Testing transfer $($safe empty states$)."<<$ endl; cout $<<"----------------------------------------"<<$ endl; trains$[0].$set$($nullptr$,-1,-1)$; $//$ safe empty state cout $<<($ transfer$($ trains$[0],$ trains$[1]))<<$ endl; cout $<<($ transfer$($ trains$[1],$ trains$[0]))<<$ endl; cout $<<"----------------------------------------"<<$ endl $<<$ endl; return $0$; $\}$ Sample Output $----------------------------------------1.$ Testing changeSpeed. $----------------------------------------$ NAME OF THE TRAIN : Bullet Train NUMBER OF PEOPLE : $100$ SPEED : $260\mathrm{.}95$ km$/$h NAME OF THE TRAIN : VIA Rail Abitibi NUMBER OF PEOPLE : $250$ SPEED : $85\mathrm{.}95$ km$/$h NAME OF THE TRAIN : Bullet Train NUMBER OF PEOPLE : $100$ SPEED : $320\mathrm{.}00$ km$/$h NAME OF THE TRAIN : VIA Rail Abitibi NUMBER OF PEOPLE : $250$ SPEED : $0\mathrm{.}00$ km$/$h $--------------------------------------------------------------------------------2.$ Testing loadPeople. $----------------------------------------$ NAME OF THE TRAIN : Bullet Train NUMBER OF PEOPLE : $201$ SPEED : $320\mathrm{.}00$ km$/$h NAME OF THE TRAIN : VIA Rail Abitibi NUMBER OF PEOPLE : $195$ SPEED : $0\mathrm{.}00$ km$/$h NAME OF THE TRAIN : Bullet Train NUMBER OF PEOPLE : $1000$ SPEED : $320\mathrm{.}00$ km$/$h NAME OF THE TRAIN : VIA Rail Abitibi NUMBER OF PEOPLE : $0$ SPEED : $0\mathrm{.}00$ km$/$h $--------------------------------------------------------------------------------3.$ Testing transfer. $----------------------------------------$ NAME OF THE TRAIN : Bullet Train NUMBER OF PEOPLE : $1000$ SPEED : $320\mathrm{.}00$ km$/$h NAME OF THE TRAIN : VIA Rail Abitibi NUMBER OF PEOPLE : $0$ SPEED : $0\mathrm{.}00$ km$/$h NAME OF THE TRAIN : VIA Rail Abitibi NUMBER OF PEOPLE : $1000$ SPEED : $0\mathrm{.}00$ km$/$h NAME OF THE TRAIN : Bullet Train NUMBER OF PEOPLE : $55$ SPEED : $245\mathrm{.}95$ km$/$h $--------------------------------------------------------------------------------4.$ Testing transfer $($safe empty states$).-----------------------------------------1-1----------------------------------------$