Determine whether each of the following could probably be validly modeled only as a random variable or if a deterministic quantity would suffice.

(a) The number of inches of rainfall in a city over the next 14 days

(b) The average 14-day rainfall in a city

(c) The market price of a common stock 1 week ago

(d) The market price of a common stock 1 week from today

(e) The seating capacity of a restaurant

(f) The number of customers who will arrive at a restaurant this evening

(g) The production rate of an industrial robot subject to frequent breakdowns

(h) The production rate of a highly reliable industrial robot

(i) Factory demand for a model of bulldozer over the next 7 days

(j) Factory demand for a model of bulldozer over the next 7 years