The three stone blocks have weights of WA = 600 lb, wB = 150 lb, and WC = 500 1b. Determin...

The three stone blocks have weights of WA = 600 lb, wB = 150 lb, and WC = 500 1b. Determine the smallest horizontal force P that must be applied to block C in order to move this block. The coefficient of static friction between the blocks is µs 0.3. and between the floor and each block µ’s = 0.5.