In an experiment to determine corrosion rates, steel plates were place in a solution of 10% HCL for various periods of time in hours and the weight loss in mg were measured. Followings are the results Time 2 4 6 8 10 12 Weight loss 0.7 6.9 7.2 11.9 16.2 22.5 a) Compute the least-squares line for predicting the weight loss(y) at a given time(x) b) Using the line predict the weight loss after 5 hours