Barbara plans to invest some money so that she has $$2,800$ at the end of three years. Determine how much should she invest today given the following choices: $($Round intermediate calculations to $6$ decimal places, eq$.2\mathrm{.}512512$ and round final answer to $2$ decimal ploces, e$.$g$.2,515\mathrm{.}25.)$

a$.4\mathrm{.}38$ percent compounded daily.

Amount required to be invested

b$.4\mathrm{.}92$ percent compounded monthly.

Amount required to be invested

c$.5\mathrm{.}2$ percent compounded quarterly.

Amount required to be invested

d$.5\mathrm{.}4$ percent compounded annually.

Amount required to be invested

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