Find all of the partial derivatives of the following functions: 1. y = f(x, x) = x + 2xx - 3x 2. 3. y = f(x, x) = (3x + xx) (2x - x) [use product rule for partial derivatives] 2x+x-7 y = f(x, x) = *++*1-7 [use the quotient rule for partial derivatives]