I need help with this question

A manufacturer estimates that production (in hundreds of units) is a function of the respective amounts x and y of labor and capital used, as follows: f (x, y) = (a) Find the number of units produced when 27 units of labor and 64 units of capital are utilized. (b) Find and interpret f,(27, 64) and f,(27, 64). (c) What would be the approximate effect on production of increasing labor by 1 unit? (d) What would be the approximate effect on production of increasing capital by 1 unit