Exercise 7-18: Hitchcock Films The following table lists the running times (in minutes) of the videotape versions of 22 movies directed by Alfred Hitchcock: Film Time The Birds 119 Dial M for Murder 105 Family Plot 120 Foreign Correspondent 120 Frenzy 116 I Confess 108 The Man Who Knew Too Much 120 Marnie 130 North by Northwest 136 Notorious 103 The Paradine Case 116 Psycho 108 Rear Window 113Time Film 132 Rebecca 81 Rope 108 Shadow of a Doubt 111 Spellbound 101 Strangers on a Train 103 To Catch a Thief plaid 126 Topaz Under Capricorn 117 Vertigo 128 a. Construct a stemplot of the distribution of the films' running times. b. Comment on key features of this distribution. c. One of these movies is unusual in that all of the action took place in one apartment and Hitchcock filmed it with very limited editing. Explain how you might be able to identify this unusual film based on the distribution of the films' running times