b. (11 points) Compared to the initial situation in which teachers did not receive any paid sick days, how will the sick pay policy described above inuence the amount of leave that teachers take? In answering this question, separately consider three different gr0ups of teachers, based upon how many days of leave they chose initially (i .e., prior to the introduction of sick pay): (1) those teachers who initially chose less than 20 days of leave, (2) those teachers who initially chose between 20 and 80 days of leave, and (3) those teachers who initially chose more than 80 days of leave. Explain your answers in terms of substitution and income effects, and draw graphs to support your answers