Consider the following data for a dependent variable y and two independent variables, x1 and x2. (a) Develop an estimated regression equation relating y to x1. (Round your numerical values to one decimal place.) y^= Predict y if x1=25. (Round your answer to one decimal place.) (b) Develop an estimated regression equation relating y to x2. (Round your numerical values to one decimal place.) y^= Predict y if x2=17. (Round your answer to one decimal place.) (c) Develop an estimated regression equation relating y to x1 and x2. (Round your numerical values to one decimal place.) (c) Develop an estimated regression equation relating y to x1 and x2. (Round your numerical values to one decimal place.) y^= Predict y if x1=25 and x2=17. (Round your answer to one decimal place.) The estimated regression equation for a model involving two independent variables and 10 observations follows. y^=21.1270+0.5809x1+0.4910x2 (a) Interpret b1 in this estimated regression equation. b1=0.5809 is an estimate of the change in y corresponding to a 1 unit change in x1 when x2 is held constant. b1=21.1270 is an estimate of the change in y corresponding to a 1 unit change in x1 when x2 is held constant. b1=0.4910 is an estimate of the change in y corresponding to a 1 unit change in x1 when x2 is held constant. b1=0.5809 is an estimate of the change in y corresponding to a 1 unit change in x2 when x1 is held constant. b1=0.4910 is an estimate of the change in y corresponding to a 1 unit change in x2 when x1 is held constant. Interpret b2 in this estimated regression equation. b2=0.4910 is an estimate of the change in y corresponding to a 1 unit change in x1 when x2 is held constant. b2=0.4910 is an estimate of the change in y corresponding to a 1 unit change in x2 when x1 is held constant. b2=21.1270 is an estimate of the change in y corresponding to a 1 unit change in x1 when x2 is held constant. b2=0.5809 is an estimate of the change in y corresponding to a 1 unit change in x1 when x2 is held constant. b2=0.5809 is an estimate of the change in y corresponding to a 1 unit change in x2 when x1 is held constant. (b) Predict y when x1=160 and x2=330