The drawing shows a large cube (mass = 46 kg) being accelerated across a horizontal frictionless surface by a horizontal force vector P . A small cube (mass = 2.5 kg) is in contact with the front surface of the large cube and will slide downward unless vector P is sufficiently large. The coefficient of static friction between the cubes is 0.71. What is the smallest magnitude that vector P can have in order to keep the small cube from sliding downward?