C++

a) Write a main() program to do the following: i i) Input three integers. (1 mark) ii) Pass all the inputs through function call named calculatel(), assign the function to a variable named sum and display the total of inputs. (3 marks) iii) Call a function named calculate2() to determine whether the code is 'O' or 'E'. Then, display the message "Odd number" if the code is 'o' or "Even number" if it is 'E