Consider the following graph below. Price sensitivity of take-up and usage Shares Purchased Purchased $7 Long-lasting and used treated nets, Kenya 0.8 . .. . . . . . O- - -= $14 Water filters, 0.6 -..... . . . . . . ..... Ghana Explain, in a . . ... . 0.2 -... ..... $1 Deworming 0 pills, Kenya . . . ..... Randomly assigned subsidized price, in 2013 USD few NUMBERED sentences, (1) what type of curves are these; (2) what's the meaning of the difference between the dashed and continuous lines, and (3) what is the unit of measure of the Y axis