Rounding Significant Figures $-$ Problem $3$

Perform each calculations, determine how many significant figures, and round to nearest value:

a$)7+3$

b$)9\mathrm{.}65+2\mathrm{.}1$

c$)5\mathrm{.}3+2\mathrm{.}0212+0\mathrm{.}023$

d$)5\mathrm{.}844\mathrm{.}6$

e$)\frac{3\mathrm{.}165}{3\mathrm{.}0}$