$1)$ DVD$-$RW stands for $.........,$ CD$-$R stands for $.........,$ and RAID stands for........., Three major properties of RAID implementations for Fortune$-100$ company sales operations are

$2)$ Briefly compare the optical disk and magnetic disk memory structures, read$/$write mechanisms, and layout using figures, etc. Compare and justify the prices of low speed, medium speed, and high speed optical players for three products. Compare and justify the prices of $5400$ rpm$,7200$ rpm$,$ and $9600$ rpm disks with the same capacity for university research desktop computers.

$3)$ Explain $$the constant linear velocity$,$the constant angular velocity$,$storage density$,$read$/$write frequency$,$multiple zone recording$,$ and $$serpentine recording$$ concepts by developing analogies from USA Federal government election operations.

$4)$ Explain the solid$-$state drive memory technologies and compare the price of $512$GB devices from two different manufacturers and justify potential reasons for possible price difference. Which one would you buy now and for year$-2034?$ Why? $($on the other side$)$