A class defined by a user (i. e., you, the programmer programmer) ... Group of answer choices might contain no data members -- only methods. might contain no user-defined methods -- only data members. will result in compiler errors if no user-defined methods -- only data -- are in the class. will result in compiler errors if no data-- only user-defined methods -- are in the class. will always have both data members and methods.

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?