A portable pollution measurement unit needs to store up to $2,000,000$ raw measurement

values, each represented using a $32$ bit value and a $64$ bit time$-$stamp. Find:

$($i$)$ the minimum size of its memory in MiB $($Mebibytes$).(2$ marks$)$

$($ii$)$ the width of the address bus that is required to allow random access to that memory