Problem 11 (t point The srtace area of a right-circular cone of radius r and height h is S = ÏrVr4h2, and its volume is V-rr2h. a) Determine h and r for the cone with given surface area S = 6 and maximal volume V. S? (b) What is the ratio h/r for a cone with given volume V = 7 and minimal surface area (c) Does a cone with given volume V and maximal surface area exist? A. yes B. no