a$-1.$

Calculate the present value of an annual payment of $$820\mathrm{.}00$ you would received for $12$ years if the interest rate is $7\mathrm{.}51\%.($Do not round intermediate calculations. Round your answer to $2$ decimal places.$)$

Present value $

a$-2.$

Calculate the present value of an annual payment of $$697\mathrm{.}00$ you would received for $16$ years if the interest rate is $7\mathrm{.}51\%.($Do not round intermediate calculations. Round your answer to $2$ decimal places.$)$

Present value $

b$-1.$

Calculate the present value of an annual payment of $$820\mathrm{.}00$ you would received for $12$ years if the interest rate is $16\mathrm{.}90\%.($Do not round intermediate calculations. Round your answer to $2$ decimal places.$)$

Present value $

b$-2.$

Calculate the present value of an annual payment of $$697\mathrm{.}00$ you would received for $16$ years if the interest rate is $16\mathrm{.}90\%.($Do not round intermediate calculations. Round your answer to $2$ decimal places.$)$

Present value $