An article in Concrete Research presented data on compressive strength, x, and intrinsic permeability, y, of various concrete mixes and cures. Summary quantities are n = 14, Ey; = 572, ?y ? 23530, ?x; = 43, ?x ? 157.42 and Ex; ? 1697.80. Assume that the two variables are related according to the simple linear regression model. Calculate the least square estimates of the slope and intercept.?