$(a)(5$ points$)If{\displaystyle \underset{n=1}{\overset{}{}}}|a_n|$ converges, what $dowe$ say about ${\displaystyle \underset{n=1}{\overset{}{}}}{a}_n?$

$(b)(5$ points$)If{\displaystyle \underset{n=1}{\overset{}{}}}{a}_n$ converges but ${\displaystyle \underset{n=1}{\overset{}{}}}|a_n|$ diverges, what $dowe$ say about ${\displaystyle \underset{n=1}{\overset{}{}}}{a}_n?$

points${\displaystyle \underset{n=1}{\overset{}{}}}{a}_n=5,$ find $\underset{n}{lim}{a}_n.$