(Arrays of Pointers to Functions) Rewrite the program of Fig. 6.22 to use a menu-driven interface. The program should offer the user four options as follows:

One restriction on using arrays of pointers to functions is that all the pointers must have the same type. The pointers must be to functions of the same return type that receive arguments of the same type. For this reason, the functions in Fig. 6.22 must be modified so that they each return the same type and take the same parameters. Modify functions minimum and maximum to print the minimum or maximum value and return nothing. For option 3, modify function average of Fig. 6.22 to output the average for each student (not a specific student). Function average should return nothing and take the same parameters as print Array, minimum and maximum. Store the pointers to the four functions in array process Grades and use the choice made by the user as the subscript into the array for calling each function.