Anew class is proposed to collect information about a group of dvds. a separate class containing information about a single dvd, named dvd, has already been created. which of the following is the best design to store the data and size of this collection?

a) have an arraylist of dvds and use its size as the size of the collection.
b) have an arraylist of dvds and an integer representing the number of dvds in the collection.
c) have an array of dvds and use its size as the size of the collection.
d) have a single dvd variable representing the last dvd added and an integer representing the number of dvds in the collection.

Me with this program in c++ ! computers represent color by combining sub-colors red, green, and blue (rgb). each sub-color's value can range from 0 to 255. thus (255, 0, 0) is bright red. (130, 0, 130) is a medium purple. (0, 0, 0) is black, (255, 255, 255) is white, and (40, 40, 40) is a dark gray. (130, 50, 130) is a faded purple, due to the (50, 50, 50) gray part. (in other word, equal amounts of red, green, blue yield gray).given values for red, green, and blue, remove the gray part. ex: if the input is 130 50 130, the output is: 80 0 80. thus, find the smallest value, and then subtract it from all three values, thus removing the gray.