4. Assume that the average MP3 file size is 3.5 megabytes, the average music video file size is 10 megabytes and the average E-book file size is 5.5 megabytes. Aisha has a portable multimedia player with 5 gigabytes of memory (5,000 megabytes). If Aisha has 200 MP3s, 50 music videos and 12 E-books on her portable multimedia player, how much free space does she have left?