6. From 2000 through 2009, the revenue per share R (in dollars) for Verizon can be modeled by: R(t) = (-0.009t2 + 0.39t + 4.3)? (0sts 9) where tis the year, with t = 0 corresponding to 200. a. How fast was the revenue per share changing in 2001, 2002 and 2005? b. Would Verizon shareholders have been happy with the performance of this stock from 2000 through 2009