$[10$ pts$]$ Given the matrices A$,$ B$,$ C$,$ and D below. Evaluate the following expressions.

A$=[[1,9,8,5,8],[1,2,1,5,7],[4,0,5,5,1],[1,8,3,1,6]],$B$=|[-1],[8],[-7],[9],[-4]|,$C$=[[1,2,-7]],$D$=[[1,0,0],[0,1,0],[0,0,1]]$

$4\mathrm{.}1$ C$(2)*$D$($:$,2)$

$4\mathrm{.}2$ A$.*$A

$4\mathrm{.}3$ C$(2$:$3)*$B$(2$:$4)$

$4\mathrm{.}4$ A$(1$:$3,1$:$2$:end$)*$D

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