Construct the specified arrays by indexing A$.$ For example, if asked for array$([0,1,2]),$ a correct answer would be A$[0,$:$].$ Each of the parts below may be performed in a single line.

$[15]$

$0$s

# run this block to initialize A

import numpy as np

A $=$ np$.$arange$(12).$reshape$(4,3)$

A

output

array$([[0,1,2],$

$[3,4,5],$

$[6,7,8],$

$[9,10,11]])$

$($A$).$

array$([6,7,8])$

Your solution here

$[17]$

$0$s

A$[2,$:$]$

output

array$([6,7,8])$

$($B$).$

array$([5,8])$