must be written in c

6.4 Create an array with n terms entered by the user. Find the maximum and minimum value of this array and the mean of the array in a single function and print it in the main program. 6.5 The number of rows and columns of two matrices and element values are entered by the user. In the functions, find the sum and difference of these matrices and print them in the main program. 6.6 Write a program that sorts the elements of an array whose element number and values are entered by the user, from smallest to largest, and prints the resulting new array to the screen. 6.7 The user enters the elements of an array with n elements. Write a program that creates a new array from the even elements of this array in the function and prints this array in the main program