The retail price of a gallon of gasoline in the US, G(t), in dollars from 1990-2018 can be found using the graph above whose equation is given by G(t) = -0.000773819t +4.6511839t2-9318.74435t + 6223306.5 where 1990 t 2018. Using the graph, estimate the average retail price of a gallon of gasoline from 1990 to 2018. Set up an integral expression that gives the average retail price of a gallon of gasoline from 1990 to 2018. Compute this expression in your calculator. Be sure to include units. 5 US Cost of Gallon of Gas Year 1990 2000 2010 2020 -2000- Number of Active Facebook Users (in millions) -1000 0 Months since March 2009 50 100 The number of active Facebook users is given by F (t), where F is measured in millions of users and t is measured in months after March 2009, 0 t 114. F(t) is given by the graph above and its equation is F(t)=0.006t2 + 17.t+236 Using the graph, estimate the average number of active Facebook users from March 2009 to September 2018 (0 t 114). . Set up an integral expression that gives the average retail price of a gallon of gasoline from 0 t 114. Compute this expression in your calculator. Be sure to include units. -1000 -500 0 Number of Active Instagram Accounts (in millions) 20 0 40 60 Months since January 2013 80 The number of active instagram accounts, I(t), in millions, from January 2013 (t = 0) can be found using the graph above whose equation is given by I(t) = 301.54e0.02114 - 210.573, where t is the number of months since January 2013. Using the graph, estimate the average number of active Instagram accounts for the first 66 months. Set up an integral expression that gives the average number of active Instagram accounts for the first 66 months. Compute this expression in your calculator. Be sure to include units.