Problem 3: The members of a truss are pin connected at joint O. Determine the magnitude of F2 and its angle for equilibrium. F1=6kN,F3=5kN,F4=8kN,=45deg, and =30deg. Write C programs to do the following: 1. (a) Write a function, int factorial (int n ), which returns n ! (the factorial of n, i.e. 123n. (b) Usiag int factorial (int n ) above, write a C program to compute 2!1+3!2+4!3+5!4+6!5+ (c) Show the assembler output when n=10