a. An experiment is given together with an event. Find the (modeled) probability of each event, assuming that the coins are distinguishable and fair, and that what is observed are the faces uppermost. (Compare with Exercises 1-10 in Section 7.1.)Four coins are tossed; the result is at most one tail._______________b. An experiment is given together with an event. Find the (modeled) probability of each event, assuming that the dice are distinguishable and fair, and that what is observed are the numbers uppermost. (Compare with Exercises 1-10 in Section 7.1.)Two dice are rolled; the numbers add to 4._______________c. An experiment is given together with an event. Find the (modeled) probability of each event, assuming that the dice are distinguishable and fair, and that what is observed are the numbers uppermost. (Compare with Exercises 1-10 in Section 7.1.)Two dice are rolled; the numbers add to 9._______________