2. The rate of growth of the number of internet users N (in billions) in the world from 2000 through 2014 can be modeled by =0.000176^3 +0.00243^2 +0.0070+0.092 Where t is the time in years, with t = 0 corresponding to 2000. The number of internet users in 2014 was 2.9 billion. (Source: International Telecommunication Union) a. Find the model for the number of internet users in the world. b. Use the model to predict the number of internet users in the world in 2021. Does your answer seem reasonable? Explain. c. Look online to find the number of internet users worldwide in 2021. How does your answer from (b) compare?