Draw a diagram of the memory structure after the following

statement has been evaluated:

$-$

$$aList

$=$

$[$

$[$

$1$

$]$

$,$

$2$

$,$

$[$

$3$

$,$

$4$

$]$

$]$

$-$

$$a

$=$

$[$

$[$

$[$

$]$

$]$

$]$