Can you show me the steps to get the answer for the following?

1a. If S = \\x'+ y2 , what will dS/dt be if dx/dt = -2 and dy/dt = 2 and x = 4 and y = 11? 1b. If S is constant, how will dx/dt relate to dy/dt? 2. S = TTrs +T r gives the surface area a. How is dS/dt related to drdt if s is constant? b. How is dS/dt related to ds/st if neither r nor s is constant?1a. If S = \\x'+ y2 , what will dS/dt be if dx/dt = -2 and dy/dt = 2 and x = 4 and y = 11? 1b. If S is constant, how will dx/dt relate to dy/dt? 2. S = TTrs +T r gives the surface area a. How is dS/dt related to drdt if s is constant? b. How is dS/dt related to ds/st if neither r nor s is constant