1. Div, Grad, and Curl. Let F(x, y, z): 2xz²i+j+y³zxk, expressions for the following quantities where they are defined. (a) ▼ƒ; (b) ▼ x F; (c) V. F; (d) ▼ x f; (e) F × Vf; (f) F · ▼ƒ; . (g) ▼. f; (h) V²f; (i) V²F. f(x, y, z) = x²y. Find