The demand function for a commodity is given as Qd = 21 - 3p.
(a) Use the demand function to complete the table below. [6 marks]

Price $	0	1	3	4	5	6
Quantity demanded (Kg)

(b) Draw the demand curve for the completed schedule in 1(a) (Use of graph sheet is essential) [8 marks] 
(c) Outline any three factors affecting demand [6 marks]