When people buy a certain type of laptop, there are three mostpopular upgrading options: upgrade the RAM (A), upgrade the harddrive (B), upgrade the graphic card (C). If 50% of all purchasersrequest A, 40% request B, 36% request C, 66% request A or B, 76%request A or C, 66% request B or C, and 86% request A or B or C,determine the probabilities of the following events.
(1) One randomly selected purchaser will request at least one ofthe three options.
(2) One randomly selected purchaser will select none of thethree options.
(3) One randomly selected purchaser will request only option Cand not neither of the other two options.
(4) One randomly selected purchaser will request exactly one ofthe three options.
