Write a program with a graphical interface that allows the user to convert an amount of money between u. s. dollars (usd), euros (eur), and british pounds (gbp). the user interface should have the following elements: a text box to enter the amount to be converted, two combo boxes to allow the user to select the currencies, a buttonto make the conversion, and a label to show the result. display a warning if the user does not choose different currencies. use the following conversion rates: 1 eur is equal to 1.42 usd. 1 gbp is equal to 1.64 usd. 1 gbp is equal to 1.13 eur.

The volume v and paper surface area a of a conical paper cup are given by where r is the radius of the base of the cone and h is the height of the cone. a. by eliminating h, obtain the expression for a as a function of r and v. b. create a user-de ned function that accepts r as the only argument and computes a for a given value of v. declare v to be global within the function. c. for v ! 10 in.3 , use the function with the fminbnd function to compute the value of r that minimizes the area a. what is the corresponding value of the height h? investigate the sensitivity of the solution by plotting v versus r. how much can r vary about its optimal value before the area increases 10 percent above its minimum value?