Which number line can be used to find the distance between 6-1, 2) and (5,2)? 6 5 4 3 2 1 0 1 LE LO 1 6 7 OS - 16 5 4 43 42 41 2 3 5 -3 -2 -1 0 4 5. Plz hurry I am timed

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?