HELP PLEASE!

The probability that the item IS NOT in the array is 41. If the item is in the array, the probability that the last item in the array matches the search key is 81. The probability that the next to the last item of the array matches the search key is 51. The probabilities matching any of the remaining items are all equal. 1. ( 0.8 points) What is the probability (as a function of n ) of matching one of the 1st through (n2)nd items? Show all your work to get credit 2. (0.8 points) Assuming that comparison of an array item where the search key is the basic operation, what is the average case complexity function for sequential search under these conditions. Show all your work to get credit 3. ( 0.2 points) What is the big O average case time complexity under these conditions