In Racket, which of the following is a call of the predicate for the defined movie struct? Select all that apply. A)  (check-expect (movie-length TOY) 81) B)  (make-movie "Beauty and the Beast" "Gary Trousdale" 92 true) C)  (check-expect (movie-title LION) “Toy Story") D)  (movie? 81) E)  (movie-dvd? LION) (define-struct movie (title director length dvd?)) ; a Textbook is a (make-book String String Natural Boolean) ; interp: a movie where ; title is the movie’s title ; director is the name of the movies’ director ; length is the length of the movie in minutes ; dvd? is whether the movie is available in dvd format (if true) (define TOY (make-movie “Toy Story" "John Lasseter" 81 true)) (define LION (make-movie "The Lion King" "Rob Minkoff" 89 false))

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Choose the correct statements. The this pointer is accessible (i) Within all the member functions of the class (ii) Only within functions returning void (iii) Only within non-static functions (iv) Within the member functions with zero arguments

Q1: Research Groups In response to popular demand, Dan’s established two research groups A and B composed of his n graduate students. Each of these students is a member of exactly one of the two groups at any given time. The students are numbered from 1 to n in some arbitrary order. To measure the success of his research groups, Dan assigns a citation score to each of them. Initially, both groups have citation score 0. Throughout the semester, events of the following two types happen: Student x publishes a paper in which they cite student y’s work (youcan assume all of the students have been around long enough to have prior research that can be cited). As a result, If x and y are in the same group, their group’s citation score increases by 1. If x and y are in different groups, y’s group’s citation score increases by 5. Dan changes student x’s group (from A to B or from B to A) to have them work on different projects. To assess the overall success of the research groups, Dan…