answer question plz

7. [Geogebra Question] Let's use Geogebra to compose two complicated functions and determine the specific values in Question 68 of the textbook on page 76. A study pre- pared for the National Association of Realtors estimated that the number of housing starts per year over the next 5 years will be 7 N(r) = 1 + 0.02+2 million units, where r (percent) is the mortgage rate. Suppose the mortgage rate t months from now will be r(t) =- 5t + 75 t+ 10 (0