Songs from your favorite band are 300, 180, 150, 210, 120, 270, 210, 300, 150, 210, 120 and 150 seconds long. Suppose you want to store these songs on compact disks. If a compact disk can hold 10 minutes determine the following:
(a)The number of compact disks necessary using the next-fit-decreasing algorithm is .
(b)The first-fit-decreasing heuristic requires compact disks.
(c)The number of compact dis ks necessary using the worst-fit algorithm is .
(d)The worst-fit-decreasing algorithm requires compact disks.