When a class method is marked with the keyword friend in a .h file,
select one:
a. it will be a compile error if c++ programmers mark that class method with the keyword friend in the class' .cpp file.
b. it will be a run-time error if c++ programmers mark that class method with the keyword friend in the the class' .cpp file.
c. it will be required for c++ programmers to mark that class method with the keyword friend in the class' .cpp file.
d. it will be a link error if c++ programmers mark that class method with the keyword friend in the class' .cpp file.
e. none of the choices here are correct.

The purpose of this problem is to write some small functions and practice passing things around amoung functions.1) the main function shall ask the user to enter three numbers and read the three numbers.2) write a function named findsum that takes three numbers as arguments and returns their sum. the main function shall call this function.3) write a function named findaverage that takes the sum and the number of numbers and returns the average. the main function shall call this function.4) write a function named findsmallest that takes the three numbers and returns the smallest value. the main function shall call this function.5) the main function shall print the results in the following format, with two decimal positions and the decimal points aligned: