3.34 * Use step-by-step propagation to find the following quantities (assuming that all given uncertainties are independent and random):
(a) (20 +/- 1) [50 +/- 1) / (5.0 +/- 0.2)]
(b) (20 +/- 1)* [(30 +/- 1) - (24 +/- 1)]
c) (2.0 +/- 0.1) * tan (45 +/- 3º)
[In part (c), the number 2 is exact.]
