$2\mathrm{.}8.$ What is the value of $Z$ after execution? $M$ is any user$-$provided whole number greater than $1.$ ALPHA and $P\_$INITIAL are any user$-$provided real numbers.

INPUT ALPHA, M$,$ P$\_$INITIAL

$P=P\_$INITIAL

FOR $K=1$ to $M$

$P=P+$ALPHA $**K$

END FOR

$Z=P$