Assume that you are moving a box with the height of b=2.7 m and width of a=1.5 m. Suddenly, the box slips from your hands and starts pivoting at the edge of a step. Find the required parameters for the two following scenarios: a) The box purely rotates about point A  until it gets to the angle θ=37∘ when it starts slipping at the edge of the step. What is the static coefficient of friction between the box and the step?