What is the probability of these events when we randomly select a permutation of {1, 2, …, n} where n ≥ 4?
a) 1 precedes 2.
b) 2 precedes 1.
c) 1 immediately precedes 2.
d) n precedes 1 and n − 1 precedes 2.
e) n precedes 1 and n precedes 2.