A person flips a penny, a nickel, and a dime. Each coin can land with heads up (H) or tails up (T). The following tree diagram displays the different outcomes. Please answer within the next 2-3 hours! I will mark you brainliest!

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?

Which is the focus of a parabola with equation y2=4x

Plzzz answer both questions and i will give you 100 points