The rise time of a reactor is measured in minutes (and fractions of minutes). Let the sample space be positive, real numbers. Define the events A and B as follows:
A = {x | x < 72.5}
And
B = {x | x > 52.5}
Describe each of the following events:
(a) A’
(b) B’
(c) A ∩ B
(d) A U B