For each of the following cases, indicate $($a$)$ to what rate columns, and $($b$)$ to what number of periods you would refer in looking up the interest factor.

In a future v$$lue of $1$ table:

In a present value of an annuity of $1$ table: $($Round "Rate of Interest" answers to $1$ decimal place, e$.$g$.4\mathrm{.}5\%$ and other answers to $0$ decimal places, e$.$g $45.)$

$\backslash$table$[[,\backslash$table$[[$Annual$],[$Rate$]],\backslash$table$[[$Number of$],[$Years$],[$Invested$]],\backslash$table$[[$Number of$],[$Rents$],[$Involved$]],\backslash$table$[[$Frequency of$],[$Rents$]],($a$)$ Rate of Interest$],[$a$.,10\%,28,28,$Annually,$],[$b$.,10\%,15,30,$Semiannually,$],[$c$.,8\%,7,28,$Quarterly,$]]$