Round eoch of the following to the indicated significant digits and write ine armwer in standord scientific notation:

a$.0\mathrm{.}00034159$ to $3$ digits

b$.103\mathrm{.}351{10}^2$ to $4$ digits

c$.17\mathrm{.}9915$ to $5$ digits

d$.3\mathrm{.}365{10}^5$ to $3$ digits