Answer:
There is no short answer.
Explanation:
Let's say that the time it takes for Kyoki to finish the job is X and the Y represents if he takes the job or doesn't in 1 or 0. Than for the conditions given in the question an inequality can be written as;
Y = 1 for T < 1
Y = 0 for 1 < T < 4
Y = 1 for T > 4
I hope this answer helps.