1. In how many ways can Vea, Lyka, Renz, and Cliff be seared in a row of four chairs if: a. They can occupy any place they wish? b. Lyka and Vea insist of sitting together? c. If Lyka, Cliff and Renz insist of sitting together?

A box of 6 donuts has 3 plain donuts, 2 chocolate donuts, and 1 blueberry donut. Assume the plain donuts are identical, and the chocolate donuts are identical. How many visually distinct arrangements of the donuts are there?

A company is organizing a team-building event with various activities. There are 12 employees attending the event, and they need to be split into three teams: Team A, Team B, and Team C. Each team should have at least 2 members but no more than 6 members. In how many different ways can the teams be formed? (Note: The order of the teams doesn't matter; i.e., Team A, Team B, and Team C is the same as Team C, Team A, and Team B.)

3. A survey of 1,035 tourists visiting Orlando was taken. Of those surveyed: 255 tourists had visited LEGOLAND 270 tourists had visited Universal Studios 82 tourists had visited both the Magic Kingdom and LEGOLAND 65 tourists had visited both the Magic Kingdom and Universal Studios 90 tourists had visited both LEGOLAND and Universal Studios 23 tourists had visited all three theme parks 86 tourists did not visit any of these theme parks How many tourists only visited the Magic Kingdom (of these three)?