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 value 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 $45.)$