please help me solving those questions.

please explain your answers and how you got them

3. Find the average runtime complexity of binary search procedure binary search (x: integer, 21,22,...,0, increasing integers) i:=1 {i is the left endpoint of interval) jenis right endpoint of interval while i . then i:=m+1 else j :=m if x = a, then location=1 else location = 0 return location 4. Greedy strategy a. Does using the greedy algorithm for making change of n cents give a correct solution if a nickel was worth 6 cents instead of 5? (we have 1, 6, 10 and 25 cent coin denominations) b. We have n unique items. For i = 1,2,3,...,n, each item has a weight w> 0 and value > 0. Write a greedy algorithm to find the maximum value of items that can be carried in a knapsack with a maximum weight capacity of W. An item may be broken into pieces and only a fraction put into the knapsack. It should take an array of weights, an array of item values and the weight limit of the knapsack as input. The array of weights and items are ordered such that w, corresponds to the same item as v