Please explain the answer to Case A $($b$)$ im confused For each of the following cases, indicate $($a$)$ what interest rate columns and $($b$)$ what number of periods you would refer to in looking up the discount rate.

$(1)$ In Table $3($present value of $1)$:

$\backslash$table$[[,$Annual Rate,Number of Years Invested,Discounts per Year$],[$Case A$,9\%,5,$Annually$],[$Case B$,12\%,14,$Semiannually$],[$Case C$,10\%,10,$Semiannually$]]$

$($a$)$

$($b$)$

Case A $\%$ periods

Case B $\%$ periods

Case C $\%$ periods