Question $1$

What is the mean absolute percent error for the cumulative mean forecast for Product A$?($format x$.$xx or xx$.$xx$)$

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Period & $\backslash$multicolumn$\{5\}\{$c$\}\{$ Product A Product B Product C Product D Product E $\}\backslash \backslash$

$1$ & $96$ & $107$ & $164$ & $168$ & $217\backslash \backslash$

$2$ & $98$ & $94$ & $156$ & $200$ & $190\backslash \backslash$

$3$ & $103$ & $98$ & $161$ & $194$ & $184\backslash \backslash$

$4$ & $97$ & $100$ & $155$ & $177$ & $196\backslash \backslash$

$5$ & $104$ & $95$ & $152$ & $172$ & $185\backslash \backslash$

$6$ & $96$ & $106$ & $155$ & $195$ & $208\backslash \backslash$

$7$ & $103$ & $102$ & $153$ & $193$ & $196\backslash \backslash$

$8$ & $103$ & $104$ & $150$ & $191$ & $199\backslash \backslash$

$9$ & $103$ & $95$ & $151$ & $182$ & $219\backslash \backslash$

$10$ & $103$ & $90$ & $158$ & $181$ & $204\backslash \backslash$

$11$ & $99$ & $107$ & $159$ & $161$ & $215\backslash \backslash$

$12$ & $103$ & $103$ & $154$ & $189$ & $182\backslash \backslash$

$13$ & $100$ & $90$ & $159$ & $171$ & $212\backslash \backslash$

$14$ & $105$ & $104$ & $155$ & $174$ & $196\backslash \backslash$

$15$ & $96$ & $103$ & $154$ & $163$ & $181\backslash \backslash$

$16$ & $97$ & $103$ & $162$ & $195$ & $200\backslash \backslash$

$17$ & $103$ & $92$ & $158$ & $190$ & $210\backslash \backslash$

$18$ & $100$ & $94$ & $164$ & $178$ & $213\backslash \backslash$

$19$ & $102$ & $108$ & $158$ & $198$ & $209\backslash \backslash$

$20$ & $100$ & $104$ & $154$ & $166$ & $208\backslash \backslash$

$21$ & $97$ & $100$ & $162$ & $187$ & $191\backslash \backslash$

$22$ & $99$ & $94$ & $159$ & $166$ & $216\backslash \backslash$

$23$ & $95$ & $93$ & $152$ & $186$ & $199\backslash \backslash$

$24$ & $99$ & $106$ & $163$ & $167$ & $188\backslash \backslash$

$25$ & $102$ & $102$ & $150$ & $172$ & $183\backslash \backslash$

$26$ & $105$ & $102$ & $153$ & $182$ & $219\backslash \backslash$

$27$ & $100$ & $94$ & $154$ & $176$ & $217\backslash \backslash$

$28$ & $96$ & $93$ & $153$ & $169$ & $205\backslash \backslash$

$29$ & $101$ & $93$ & $152$ & $166$ & $219\backslash \backslash$

$30$ & $98$ & $97$ & $150$ & $187$ & $202\backslash \backslash$

$31$ & & & & & $\backslash \backslash$

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