1. Evaluate the partial derivative ay of the function 2 - f( x, y) defined implicitly by an equation 2 2 -e 37 - 2xy at the point (1, 0, 1). 2. The temperature at any point in a space is given by the function T(x, y, z) = 3y - 2acz" Find the directional derivative at the point (-1, 2, 1) in the direction of 3 - (2, 2, 1)