Question: 1. Give an CREW algorithm for solving the problem of multiplying an nxn matrix A and vector x in O(log n time. How many processors

1. Give an CREW algorithm for solving the problem of multiplying

1. Give an CREW algorithm for solving the problem of multiplying an nxn matrix A and vector x in O(log n time. How many processors does your algorithm require? How much work does it require? Comparing your algorithm to its sequential one, what is its efficiency and speedup? (Use O() notation to describe various results). 2. Make the algorithm in Problem 1 to work on an EREW PRAM. What is its running time? 3. Input: x[1],12],x13],., xli]. , [n] Output: yli] 1iK where y[i] saves the maximum number among the first i elements of array x. Please give an O(log n) time parallel EREW algorithm. 4. Give a constant time CRCW PRAM algorithm for problem 3 5. Give an O(1) CRCW algorithm for Logical OR

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