Daily demand for newspapers for the last $10$ days has been as follows: $12,13,16,15,12,18,14,12,13,15($listed from oldest to most recent$).$ Forecast sales for the next day using a two$-$day weighted moving average where the weights are $3$ and $1$ are:

Question $36$ options:

$12\mathrm{.}25$

$13\mathrm{.}5$

$14\mathrm{.}5$

$14$

$12\mathrm{.}75$