Here is the variance$-$covariance matrix, S

Asset $1$ Asset $2$ Asset $3$ Asset $4$

Asset $10\mathrm{.}100\mathrm{.}010\mathrm{.}030\mathrm{.}05$

Asset $20\mathrm{.}010\mathrm{.}300\mathrm{.}06-0\mathrm{.}04$

Asset $30\mathrm{.}030\mathrm{.}060\mathrm{.}400\mathrm{.}02$

Asset $40\mathrm{.}05-0\mathrm{.}040\mathrm{.}020\mathrm{.}50$

$1.$ What is the variance of asset $4?$

a$.0\mathrm{.}02$

b$.0\mathrm{.}50$

c$.-0\mathrm{.}04$

d$.0\mathrm{.}05$

$2.$ What is the Variance of asset $2$

a$.-0\mathrm{.}04$

b$.0\mathrm{.}02$

c$.0\mathrm{.}30$

d$.0\mathrm{.}06$