The diagram below shows two masses in a static situation. A Mass B is situated on a shelf. There is a massless cord attached to mass B at one end, and is knotted to two other pieces of massless cord at point P. One piece is attached to mess A and the other is attached to the wall forming an angle 8 with the horizontal Given: Mass of B = 8 = U. is the coefficient of static friction between the shelf and mass B. (a) Determine the maximum mass of block A, ma, for which the system will remain stationary. (b) What is the tension, 7, in the cord attached to the wall from point P when the mass of block A is a maximum allowed to maintain static equilibrium