Question 2: Write a C program for the following functions: 1. Intstrlen(char *s); [returns string length] 2. char* strcpy(char*s1, char *s2); [Copies string s2 into string s1. The value of s1 is returned.] 3. char* strcat(char *s1, char *s2); [Appends string $2 to string s1. The first character of $2 overwrites the terminating null character of $1. The value of s1 is returned.] Use above function in your program to get and print length of a string, copy str1 to str2 and append str2 at the end of str1. Do not use string.h header file in your programme.

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