Suppose the matrix M = 0 1 1 1 0 0 1 1 1000 1010 is to be multiplied by the vector V = 1/4 1/4 1/4 1/4 (a) Show the sparse matrix representation of M (b) If the multiplication is to be done by MapReduce with the vector V stored in memory, show the output of the Mapper and the output of the reducer