$(45$ pts $)$ Box A below weighs $200$ lb and has dimensions of $8ftx3ft($width x height$).$

Box $B$ weighs $130$ lb and has dimensions of $6ftx4ft($width x height$).$ Both boxes sit on

a ramp with an angle $,$ with coefficients of static friction as given below. Starting from $0$

degrees, the angle is slowly increased. At what angle will motion occur? Will one or both

boxes move, and will slipping or tipping occur? Assume box B is centered on box A$.$