Compute the present value of interest tax shields generated by these three debt issues. Consider corporate taxes only. Assume that the marginal tax rate is $T_c=0\mathrm{.}35.$

a$.$ A $$1,000,$ one$-$year loan at $8\%.$

Note: Do not round intermediate calculations. Round your answer to $2$ decimal places.

b$.$ A five$-$year loan of $$1,000$ at $8\%.$ Assume no principal is repaid until maturity.

Note: Do not round intermediate calculations. Round your answer to $2$ decimal places.

c$.$ A $$1,000$ perpetuity at $7\%.$

$\backslash$table$[[$a$.$ Present value,$],[$b$.$ Present value,$],[$c$.$ Present value,$]]$