Jane receives utility from days spent traveling on vacation domestically (D) and days spent traveling on vacation in a foreign country (F), as given by the utility function .  In addition, the price of a day spent traveling domestically is $100, the price of a day spent traveling in a foreign country is $400, and Jane’s annual travel budget is $4,000. a.                  Illustrate the indifference curve associated with a utility of 800 and the indifference curve associated with a utility of 1200. The indifference curve with a utility of 800 has the equation 10DF=800, or DF=80.  Choose combinations of D and F whose product is 80 to find a few bundles.  The indifference curve with a utility of 1200 has the equation 10DF=1200, or DF=120.  Choose combinations of D and F whose product is 120 to find a few bundles. b.                   Graph Jane’s budget line on the same graph. If Jane spends all of her budget on domestic travel she can afford 40 days.  If she spends all of her budget on foreign travel she can afford 10 days. c.                   Can Jane afford any of the bundles that give her a utility of 800?  What about a utility of 1200? Yes she can afford some of the bundles that give her a utility of 800 as part of this indifference curve lies below the budget line.  She cannot afford any of the bundles that give her a utility of 1200 as this whole indifference curve lies above the budget line. d.                  Find Jane’s utility maximizing choice of days spent traveling domestically and days spent in a foreign country. The optimal bundle is where the slope of the indifference curve is equal to the slope of the budget line, and Jane is spending her entire income.  The slope of the budget line is . The slope of the indifference curve is . Setting the two equal we get: We now have two equations and two unknowns: Solving the above two equations gives D=20 and F=5.  Utility is 1000. This bundle is on an indifference curve between the two you had previously drawn. 이것좀 해석해주라