(b) Analyse the following program from C language. After execution, this program generates the same output for the value of x according to different parameter-passing methods: passed-by-reference and passed-by-value-result. Explain the differences of the internal operations of each method based on the given program. [4 marks] void foo (int a, int b) ( } a = 2 b + 1; b = a 1; a = 3 * a b; for (i in 1:20) { (c) The commonly-used control structures in R language are if, else, for, repeat, break, next, while and return. Explain how did the control structures operating in the following program. [2 marks] void main() ( if (1882 == 1) { next } else { print (i) int x = 5; foo (x,x); print (x);