Find the following derivatives. Z and z, where z = 6xy-xy, x = 5s + 5t, and y = 5s - 5t as = 11 5 (Type an expression using s and t as the variables.) z E = 6x-x2 (Type an expression using x and y as the variables.) ds = 5 (Type an expression using s and t as the variables.) ot = 5 (Type an expression using s and t as the variables.) at = -5 (Type an expression using s and t as the variables.) Zs = -375s - 250st + 125t + 300s (Type an expression using s and t as the variables.) Z (Type an expression using s and t as the variables.)