Two boxes sit side by side in a warehouse. The box on the left contains a refrigerator that has a mass of 130 kg. The box on the right contains a dishwasher with a mass of 70 kg. A warehouse worker pushes on the refrigerator horizontally toward right.

a) Assuming there is a coefficient of static friction between the boxes and the floor of 0.35, determine the size of the maximum force the worker can exert without moving either box.

b)Assuming neither box moves, calculate the force the refrigerator exerts on the dishwasher