The Table below relates to the supply of labour in response to the given wage rates Use the information in the table to answer the questions that follow .
 

Wage rate ($ per hour)	Hours worked (per day)	Income per day (S)
10	-	10
20	-	60
30	-	150
40	6	-
50	4	-
60	3	-

(a) Determine the number of hours of work per day if the wage rate is (i) $10 per day (ii) $20 per day (16) $30 per day 
(b) Calculate the income per day when the wage rate is (i) $40 (ii) $50 (iii) 60 

(c) (i) Which wage rate per hour attracts the highest earnings? 
(ii) Name the type of supply curve that can be associated with the data in the table. 
(iii) Explain the nature of the supply curve named in (c)(ii)