Given the following data

$\backslash$table$[[$Period$,\backslash$table$[[$Actual$],[$Demand$]],$Forecast$],[,,],[1,1200,1120],[2,1110,1140],[3,1240,1200],[4,1150,1180]]$

which of the following is true

On average, the forecast is off by $5\mathrm{.}4\%$ from the actual

On average, the forecast is off by $21\mathrm{.}5\%$ from the actual

On average, the forecast is overestimating the actual demand by $15$ units

On average, the forecast is off by $3\mathrm{.}8\%$ from the actual

$.$On average, the forecast is off by $15\mathrm{.}2\%$ from the actual