Please give the correct C programming codes.

3. Write a program in C to find the sum of the series 1 +11 + 111 + 1111 + .. n terms. The value of n will be given by the user User Input: 3 Output: 1+11+111=123 4. Write a program in C to make a pyramid with similar pattern. The number of rows will be taken as input from the user. If you run out of alphabets, you will have to use Asterisk **' symbol for the rest of the positions User Input: 4 Output: BC DEF GHIJ