The amounts of 6 restaurant bills and the corresponding amounts of the tips are given in the below. Bill 64.30 97.34 106.27 88.01 70.29 52.44 Tip 7.70 16.00 16.00 10.00 10.00 7.00 +2 T. (a) The regression equation is = (b) If the amount of the bill is $75, the best prediction for the amount of the tip is (c) Coefficient of correlation is r (d) Test no correlation hypothesis using a 0.05 confidence level: Do we reject or accept null hypothesis of no correlation? A. Accept B. Reject (e) What was your critical value in the above test?