Question: An environmental study of a certain community suggests that the average daily level of smog in the air will be \(Q(p)=\sqrt{0.5p+19.4}\) units when the population is p thousand. It is estimated that t years from now, the population will be \(p(t)=8+0.2{{t}^{2}}\) thousand.

a. Express the level of smog in the air as a function of time.

b. What will the smog level be three years from now?

c. When the smog level reach 5 units?