10.1 Use the same data as in Problem 8.2 to answer the following questions.

(a) Plot the 2-dimensional confidence contours at 68 and 90% significance, by sampling the (a,b) parameter space in a suitable interval around the best-fit values.

(b) Using a suitable 2-dimensional confidence contour, determine the 68% confidence intervals on each parameter separately, and compare with the analytic results obtained from the linear regression method.