If you invest $\backslash (\backslash$$ $9,900\backslash )$ per period for the following number of periods, how much would you have in each of the following instance? a$.$ In $8$ years at $9$ percent? $($Do not round intermediate calculations. Round your final answer to $2$ decimal places.$)$ b$.$ In $30$ years at $7$ percent? $($Do not round intermediate calculations. Round your final answer to $2$ decimal places.$)$