Write a C program to print all unique elements present in array. Follow the given steps: 1) Define an array that stores 20 integer numbers (1.e. numbers[20]). then initialize the array by using initializer list method such that numbers[20]={4,7,9,9,2,1,0,3,4,5,6,9,8,9,0,8,4,3,5,8) ii) The program must include frequency function that receives numbers array and its size (Prototype of the function is void frequency (const int al], const int size) ). In the function, define an integer array that stores 10 numbers (i. freg[10]) and initialize the array items with zero. Then, calculate and print frequency of each number. An example output is given below. Lastly, call printAliUniques function 111) The program must include printalliniques function that receives the freq array and its size (Prototype of the function is void printAllUniques (const int all, const int size)). In the function, print all unique elements present in array. Numbers 479 9 2 1 0 3 4 5 6 9 8 9 8 8 4 3 5 8 Number Frequency 00 OWNP3 2 1 1 2 3 2 1 1 9 Unique Elements: 1 2 67