The point P(0.5, 4) lies on the curve y = 2/x . Let Q be the point (x, 2/x). a.) Find the slope of the secant line PQ for the following values of x. If x = 0.6, the slope of PQ is: If a = 0.51, the slope of PQ is: If a = 0.4, the slope of PQ is: If a = 0.49, the slope of PQ is: b.) Based on the above results, guess the slope of the tangent line to the curve at P(0.5, 4)