URGENT: please solve this in C language thank you so much

Q3. (20 marks) Write a C program that reads two strings (each maximum 50 characters) reads a positive integer n - concatenates n first characters from the second string to the first string a. using pointers (10 marks) b. using string built-in function (10 marks) Example Output: Enter first string: Hello, Enter second string: my name is Minh Enter a number of characters: 12 Concatenated string = Hello, my name is M (Another example) Enter first string: Hello, Enter second string: my name is Minh Enter a number of characters: 15 Concatenated string = Hello, my name is Minh