Build a trend$-$adjusted exponential smoothing model starting in the $4$th period with $=0\mathrm{.}17$ and $=0\mathrm{.}15.$ Use $1,879$ for the first forecast and an original trend factor of $7.$

What is the forecast for period $15$ in your model?

$1,968$

$1,962$

$1,865$

$1,987$

$1,975$

$1,950$