Consider the following information about Stocks $1$ and $2$:

The market risk premium is $7\mathrm{.}5$ percent, and the risk$-$free rate is $4$ percent.

$(1)$ Which stock has the most systematic risk? $($Please enter either $1$ or $2)$

Stock

$(2)$ Which one has the most unsystematic risk? $($Please enter either $1$ or $2)$

Stock