$\backslash$table$[[$Month$,$Demand, Units$],[$January$,15],[$February$,18],[$March$,22],[$April$,23],[$May$,27],[$June$,26]]$

Use a three$-$month moving average to make a forecast for July.

$14\mathrm{.}5.$ For the data in Exercise $14\mathrm{.}4,$ use an $a$ of $0\mathrm{.}1$ to make a forecast for July.

$14\mathrm{.}6.$ For the data in Exercise $14\mathrm{.}4,$ use an $$ of $0\mathrm{.}1$ and a $$ of $0\mathrm{.}2$ to make a forecast for July and August. Calculate the MAD for your January through June forecasts.