Problem B1(a) Problem B1(b) (Tony 1A and extra part)
Problem B2 (Tony 3A)
Problems B3 and B6 (Tony 4A and 6A)
Problem B4 (Tony 4C)
Problem B5 (1) and (2) (Tony 4D, parts 1 and 2)
Problem B5 (3) is Weibel, Criterion 2.3.1 page 39.
Problem B5 (4) (Tony 4D, part 4)
Problem B7 (Tony 6B)
Challenge Problem (solution by Sindi)