(8pts)2. For the following data set, construct a stem-andleaf plot by hand and comment. 373 370 364 366 364 325 339 393 356 359 363 375 424 325 394 402 392 369 374 359 356 403 334 397 (9pts)3. Let A denote the event that the next item checked out at a college library is a math book, and let B be the event that the next item checked out is a history book. Suppose that P(A) = .4 and P(B) = .3. a. Why is it not the case that P(A) + P(B) = l? b. Calculate P( A') c. Calculate P(A U B)