In C++ please

Write a function isvalidGrade0) with a single char parameter If the function is called with A, B, C, D, or F (upper or lowercase), the function returns true. Otherwise, the function returns false Write a program that takes a grade as input and calls IsValidGrade0 with the input. If isvalidGrade() returns true the program should outpur "Grade is valid" If talse, "Grade is NOT valid:" Ex. If the input is C, the output is: Grode in valid. Ex. If the input is P, the output is Grade in nor valid