Études are composed of three sets of studies for solo piano, with 27 pieces in total.
The last one (you wrote b but I think you meant e?) I think.
A sound film is a motion picture with synchronized sound, or sound technologically coupled to image, as opposed to a silent film. ... At first, the sound films which included synchronized dialogue, known as "talking pictures", or "talkies", were exclusively shorts.
Please mark brainiest if this helped!!!
