C program nsSlide ShowReviewViewRecording HelpSh.5. Unless you need to edit, it's safer to stay in Protected View.Enable EditingPracticeWriteCprogramnamedasgetMostFreq.co Takes input text file as argumentso Outputs the most frequent letter (ignoring cases)and displays how many times that letter appears.o If the text file does not exist, print out an errormessage to the terminal.$cat test.txtThis is a list of courses.CsC 1010 - COMPUTERS & APPLICATIONS$./ getMostFreg test.txtMost frequent letter is 's', it appeared 8 times$. /getMostFreg NotExist.txtError: file not exist.Notes881210°C

The program is written in C. Please find the program below.Program #include <stdio.h> //main function starts hereint main(int argc, char *input[]){ //Declaring the variables char f[26]; int ch = 0, m = 0; FILE * ptr; //reading the file and checking the file Exixt or not if ((ptr = fopen(input[1], "r")) == NULL) { printf("File does't exists"); return -1; } for (ch = 0; ch < 26; ch++) f[ch] = 0; //while loop for iterating the character while ((ch = fgetc(ptr)) && (ch != EOF)) { if ('a' <= ch && ch <= 'z') f[ch - 'a']++; else if ('A' <= ch && ch <= 'Z') f[ch - 'A']++; } for (int i = 1; i < 26; ++i) if (f[i] > f[m]) m = i; printf("\nMost Repeated character is '%c', it appeared %d times \n", (char)('a' + m), f[m]);} Output