Given that quantity demanded per period of time is a function of price and that the relation is expressed as: Q = 60 − 1/3 P, where Q is quantity demanded and P is the price, (a) Find the quantity demanded when price is (i) N30.00 (ii) N210.00; (iii) N0.00 (b) comment on

$$Q = 60 - 10$$ $$Q = 50$$

The quantity demanded is $\boxed{\text{50 units}}$.

$$Q = 60 - 70$$ $$Q = -10$$

A negative quantity demanded means that at this price, there is no demand for the product. The quantity demanded is $\boxed{\text{0 units}}$ (as quantity cannot be negative in economic terms, it implies demand ceases at or before this price).

$$Q = 60 - 0$$ $$Q = 60$$

The quantity demanded is $\boxed{\text{60 units}}$.