Partial Derivatives 1 12 Points Q1.1 (a) 6 Points Which of the following is the limit definition of fy(a, b)? f(a,b+h)-f(a, b) lim h→0 h f(a,y+h)-f(a, y) lim y-a h f(a+h, b) f(a, b) lim h→0 h lim f(a, b) +h-f(a, b) h h→0 f(a, y+h)-f(a, b) lim y-a h Q1.2 (b) 6 Points Use h = 0.01 to estimate 9₂(1, 3) for g(x, y) = 5x2y. Give your answer to 2 decimal places. Enter your answer