%data Problem 4.18
a=[15.00 30.00 24.00 26.40  25.44 25.82 25.67 25.73 25.71 25.72 25.71]
b=[45.00 30.00 36.00 33.60  34.56 34.18 34.33 34.27 34.29 34.28 34.29] 