Question $3.$ Timestamp$-$Based Protocol $(5$ points$)$

Let schedule $S5$ contains transaction T$1,$ T$2$ and T$3$ with initial timestamp $3,$

$5$ and $9$ respectively. The initial read timestamp$($R$-$TS$)$ for data items A$,$ B

and $C=0.$ The initial write timestamp$($W$-$TS$)$ for data items $A,B$ and $C=0.$

$3\mathrm{.}1)$ What are the final R$-$TS and W$-$TS of data item $A,B,$ and $C?(3$ points$)$

$3\mathrm{.}2)$ Which transaction$($s$)$ can commit, and which transaction$($s$)$ need to

rollback or killed? $(2$ points$)$