$12.$ If the sequence is convergent then $O$ $1$ $A\right)$ it has two limits. $O$ $\left($ $B\right)$ it is bounded. $O$ $1$ $C\right)$ it is bounded above but may not be bounded below. $O$ o $\left($ (D) it is bounded below but may not be bounded above.

"Give examples of sequences $\left(a_{n}\right)$ such that us (a) $\right)$ $\left($ $\left(1a\right).1$ bounded above but not bounded below. sit m $\left(b\right)$ $i_{n}\right)is$ bounded below but not bounded $above$

Which $o1$ $-$ the following statements $1cm5$ is not $l\pi 1c$ $\left(0\right)$ A convergent sequence $isa1\times ays$ $boandcd$ $10\right)$ $A$ $5c90cncG$ which diverges $t00$ must $bcb0$ bounded $bglo1y$ (c) $A0$ oscillating sequence is $al.\times ays$ $boandcd$ (d) $Asc$ sequence which diverges $t0$ 00, $m11s1$ be bounded above.