Please solve these questions in details and explaination. Thanks so much in advance.

Determine the greatest angle 0 (in degrees) so that the ladder does not slip when it supports the man with the mass of "m" in the position shown. The coefficient of static friction at A and g = 9.81 m/s2. and B is us. Ignore the weight of the ladder. Use m = 78 kg, us = 0.33, a = 2.5m, b = 0.25m, C b O IG A /O O a O O O 70 O O O O A B yo