In this lab you are to write a program that calculates a student's final grade and outputs the final letter user. To calculate the final score assume that the tests are each worth 40% and the homework is worth 1) caleFinalscore: This function is a value-returning function whose purpose is to compute the 2) printFinalscore: This function is a non value-returning function that outputs a student's final grade to the console using functions. Two tests scores and one homework score will be supplied by the 20% of the total score. You should implement and use the following two functions final score for a student. It takes three parameters: testl, test2, and hw (all doubles), and returns the final score as a double. score and letter grade to the console. It takes the parameter finalscore (a double). The breakdown of letter grades is as follows: 90 or above is an A, 80 to 90 is a B, 70 to 80 is a C 60 to 70 is a D, and less than 60 is a big fat F The following is skeleton code you might want to use to start your program. #include using namespace std; /declare the funetion prototype for "calcFinalScore" here // declare the function prototype for "printFinalscore" here int main() /I local variables double testl, test2; // the two tests scores double hw double finalscore // the student's final score // the homework score cout > testl; cout > test2 ; cout > hw; call calcFinalScore here /call printFinalScore here system(" PAUSE" return / implement calcFinalScore here /implement printFinalScore here