Please answer step by step. SHOW ALL WORK.

17- A campground owner has 1600 m offencing. He wants to enclose a rectangular eld bordering a river, with no fencing along the river. (See the sketch.) Let x represent the width River of the eld. (a) Write an expression for the length ofthe eld as a function of x. x \\ (It) Find the area of the eld (area = length xwidth) as a function of x. (c) Find the value of x leading to the maximum area. (d) Find the maximum area. (a) 30') = (b) A00 = (c) First write the expression for the derivative used to nd the x value that maximizes area. The xvalue leading to the maximum area is {1) (d) The maximum area of the rectangular plot is (2) (1) 0 m2. (2) 0 m2. 0 at. O m. 0 m3. 0 m3. ID: Bus Econ 6.2.9 13- The short-ten'n demand for crude oil in Country A in 2008 can be approximated by q= f(p) = 2.253.388p "0'03, where p represents the price of crude oi in dollars per barrel and q represents the per capita consumption of crude oil. Calculate and interpret the elasticity of demand when the price is $64 per barrel. The elasticity of demand for oil is . (Type an integer or a decimal.) What is the elasticity of demand for oil when the the price is $64 per barrel? (Type an integer or a decimal.) Interpret the elasticity of demand. Choose the oonect answer below. 0 A. The demand is elastic. so as price increases. revenue increases. 0 B. The demand is inelastic. so as price increases. revenue decreases. O c. The demand is elastic. so as price increases, revenue decreases. O D. The demand is inelastic, so as price increases, revenue increases