Answer:
both (a) and (b) are true
That is:
a. job one pays less per day but more per hour.
b. job three pays more per day and more per hour.
Explanation:
An indifference curve is one that shows all combinations of a good or activity that gives the same level of satisfaction to the consumer, and so the consumer is indifferent.
In this instance the worker is indifferent between job one lasting 4 hours a day, job two lasting 8 hours a day (pays $10 an hour), and job three lasting 12 hours a day.
For the worker to be indifferent job one must pay more per hour and less per day. Whole job 3 wi pay more per day and more per hour.