Define an indextree class such that each node has data fields to store a word, the count of occurences of that word in a document file, and the line number for each occurrence. use an arraylist to store the line numbers. use an indextree object to store an index of words appearing in a text file, and then display the index by performing an inorer traversal of this tree. java data structures.

When early motion pictures played in movie theaters, they were often accompanied by live organ or piano music. which of the following are the most likely reasons that this happened? (select all that apply). the music was provided to distract audience members from the loud sounds made when filmstrips were changed. the music accompanied the movies because the movies were silent and audiences were used to hearing music during plays in theaters. the music usually was played before, and sometimes after the movie, as an alternative form of entertainment. the music viewers to interpret the dramatic action in the films.