Musixscore.com is an online service providing sheet music to customers. On the "browse music" Web page, customers select a genre of music from a dropdown list. The Web page uses Ajax to obtain a Iist of performers, musicians, or groups that match the qenre, which is formatted as a drop-down 1ist. When a selection is made from the performers drop-down l-j-st, the Web page uses Ajax to display a third drop-down }ist displaying all of the Compact Discs (CD) or other works of the performer. When a CD is selected, the Web page uses Ajax to obtain all the songs on the CD in a fourth drop-down 1ist. The viewer may make multiple selections. When the Add To Shopping Cart image is clicked, the sonqs are added to the shopping cart. The viewer may change any of the drop-down lj-sts to select additional sheet music, and the process is repeated. (Kendall & Kendall, 2011)

Write a use case description for the Browse Music Score use case to represent the activitv.