Consider the following C function:

int f(int n)
{
static int i = 1;
if(n>=5) return n;
n = n+1;
i++;
return f(n);
}

The value returned by f(1) is

Choose the best matching between the programming style in Group 1 and their characteristics in Group 2

Group 1
P. Functional
Q. Logic
R. Object-oriented
S. Imperative

Group 2
1. Command-based, procedural
2. Imperative, abstract data types
3. Side-effect free, declaretive, expression Evaluation
4. Declaretive, clausal representation, theorem proving

The goal of structured programming is to

The language $$\left\{ {{a^m}{b^n}{c^{m + n}}\left| {m,n \ge } \right.} \right\}$$ is