c programming

Question 4 Write a function named mystrcat() to concatenate two string pointers char *stri and char *str2 and return char *str. Note: DO NOT USE strcat() from library. Extend your program with a function named convertToUppercase () to accept a character pointer char *sPtr and change all letters in the string to uppercase. Question 5 Rewrite the following using a recursive function countingUp (int n) to print from the number 1 to a given number, n, in ascending order void countingUp (int n) for (int i = 1; i 0, basew = base * based Now, modify your recursive function above to use the following formulas: Formulas: if exp = 0, baser" = 1 if exp > 0 and exp is odd, basen = base * base! if exp> 0 and exp is even, base = (base)"w/2<>