same as the work output, assuming no losses to friction. What must be the ratio of the distance the secondary (output) piston moves to the distance the primary (input) piston moves?

Hydraulic systems utilize Pascal's principle by transmitting pressure from one cylinder (called the primary) to another (called the secondary). A certain hydraulic system is designed to exert a force 85 times as large as the one put into it

Part (a)  What must be the ratio of the area of the secondary cylinder to that of the primary cylinder? 

Part (b)  What must the corresponding ratio of their diameters be? 
   Part (c)  By the conservation of energy, the work input to such a system must be the same as the work output, assuming no losses to friction. What must be the ratio of the distance the secondary (output) piston moves to the distance the primary (input) piston moves?