Please answer all questions.

Question 6(1 point) There are 25 horses among which you need to find out the fastest 3 horses. You can conduct race among at most 5 to find out their relative speed. At no point you can find out the actual speed of the horse in a race. Find out how many races are required to get the top 3 horses Save Question 7(1 point) Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 1,2,3, 5, 8,13, 21, 34, 55, 89,. Save Question 8 (1 point) Which data structure is used for balancing of symbols? (such as making sure an open parenthesis has a closing one) 1) Queue 2) Graph 3) Stack 4) Tree Save