Answer the following questions related to big-Oh and its relatives. You must follow the definitions of big-Oh and its relatives (such as to find c and n0 if your answer is yes, and provide an explanation if your answer is no). (You must justify your answer. Simply say True or False is not enough) Consider f(n)- 3n2 + 3n. (a) Is it O(n2)? (b) Is it (r)? (c) Is it (n2)? (d) Is it o (n3)