$[2$ pts each, total $6pts]$ Give tight asymptotic bounds $($ bound$)$ for each of the following

recurrences. If you used the master method, clearly specify $a,b,f(n)$ or $$ value and which case

you applied; if not, justify your answer.

A$)T(n)=4T(\frac{n}{2})+2n^2$

B$)T(n)=7T(\frac{n}{9})+3n$

C$)T(n)=6T(\frac{n}{6})+nlogn$