1. (14 points) For below program coded by C programing language, answer the following questions. int Sum(int a[], int n) / : the length of array a \{ int s=0; for (i=0;in;i++) s+=a[i] return s; \} 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 Sum (). (6 points) 2. (10 points) List some Integration Testing Strategy. 3. (15 points). For the given flow chart below, (1) Describe three ways to obtain its Cyclomatic Complexity; (2) Calculate its Cyclomatic complexity; (3) List its independent paths 4. (10 points)Present the difference between validation and verification testing. 5. (12 points) What is Risk Analysis? 6. (16 points) Explain testing tools with its types. 7. (13 points) Explain GUI testing Environment with its issues 8. (10 points) What professional characteristics and skill are necessary for a software tester