With the answer in Question ONE, calculate the MAD and MAPE with the actual demand below:

Season

Actual demand

S$1$

$780$

S$2$

$623$

S$3$

$413$

S$4$

$521$

a$.$

MAD $21\mathrm{.}25.$ MAPE $3\mathrm{.}76\%$

b$.$

MAD $20\mathrm{.}75,$ MAPE $4\mathrm{.}22\%$

c$.$

MAD $40,$ MAPE $6\mathrm{.}59\%$