$/*$ Grows a to double its current size if newSize exceeds a$\text{'}$s capacity. Does

$*$ nothing if newSize $<$ a$.$length. Grow the array by allocating a new array

$*$ and copying the old array's contents into the new one. This does $*$not$*$

$*$ change the AList's size. $*/$

protected void growIfNeeded$($int newSize$)\{$

$//$ TODO $2$a

$\}$

$/**$ Resizes the AList.

$*$ this $*$does$*$ modify the size, and may modify the capacity if newsize

$*$ exceeds capacity. $*/$

public void resize$($int newsize$)\{$

$//$ TODO $2$b

$\}$