Reference: The problems are based on the second weeks' lectures and Thomas' Calculus. Early Transcendentals, 14th ed., sections 14.2-14.4.4. Estimate the rate of change, ft, of the function f(:1:, y) : 3:293 my + :1: + 1 at {1, l} a) if you move from the point {1, 1) two imits in the positive Idireetion b) if you move from the point {1, 1) one unit in the positive :rdireetion that is the instantaneous rate of change if you move from the point (1, 1) in the positive ardirection