A(n) ________, a main document type for a mail merge, creates a single document that contains a list of addresses

18. What is the output of the following code fragment?

int f1(int n, int m) { if(n < m) return 0; else if(n==m) return m+ f1(n-1,m); else return n+ f1(n-2,m-1); } int main() { cout << f1(1,4); return 0; } a. 0 b. 2 c. 4 d. 8 e. infinite recursion

Execute a command (say sort command) as a background process.

What will be an ideal response?