help me to solve this problem microcontroller 8051 ???

a. Write a code that will add three BCD numbers each of size 3 digits. b. Write a program that will read 10 numbers from location 30H in RAM, find the sum, and store it in location 60H in RAM. Find also the maximum number of the 10-numbers stored in RAM and store it at B register. Write a code to solve the following problem: Suppose I have two switches connected as follow: Switch is connected to port 3, pin 5. Switch 2 is connected to port 3, pin 7. A light bulb is connected to port 1, pin 1. When you turn any switch on, the light bulb should be on; otherwise the light bulb should be off. c