$(30\%)$ An empty minivan weights $1450$ kg distributed $60\%$ on the front axle and $40\%$ on the

rear. The wheelbase is $3\mathrm{.}1$ meters. The CG height of the empty vehicle is $690$ mm $.$ The van can

haul seven passengers. Assume the passengers each weight $75$ kg and they are located $2$ in the

front seat, $2$ in the middle seat and $3$ in the rear. The CGs of the passengers in each seat are

indicated in the drawing.

a$)$ Find the horizontal and vertical location of the composite CG $($van plus passengers$)$

b$)$ Calculate the weight on the front and rear wheels with the seven passenger load.