software assurance quality and testing help me please

1. (12 points) For below program coded by C programing language, answer the following questions. int Addint a, int b) { intc; c=a+b; return c; } Q1: Present the definitions of stub module and driver module in unit testing. (4 points) Q2: Depict a simple unit testing environment. (4 points) Q3: Design a driver module for function Addo (4 points)