An elevator starts from rest, accelerating at a constant rate for $3$ seconds until reaching a speed of $5\mathrm{.}4$ m$/$s upwards. It continues ascending at this speed for $8\mathrm{.}5$ seconds and then slows down in $5\mathrm{.}5$ seconds to a new speed of $2\mathrm{.}5$ m$/$s$.$

Part A$)$ How far has the elevator risen in $7$ seconds? Answer in meters.

Part B$)$ What is the total distance the elevator travels?