1.3, 1.10, 1.19, 1.20, 1.27, 2.9, 3.1, 3.2, 3.4, 3.6, 3.9, 4.5, 4.9, and 4.19. 
On problem 1.10, where it says "and autocorrelation function" in line 2, it should be autocovariance function.