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3. 3. Observe the following partial program. Answer the questions below. n 1) long factorial (long n) { if (n -- 01|n return 1; else return n* factorial (n - 1); i. Is this partial program is function declaration or function definition? ii. State two(2) differences between function declaration and function definition. iii. Is this function has any parameter? Explain why. iv. In your opinion, discuss the benefit of recursion