Computing the Mean:Version 2 1:class MAPPER 2 method MAP(string t,integer r) 3: EMIT(string t,integer r) 1:class COMBINER 2: method CoMBINE(string t,integers [r1,r2,...) 3: sum←-0 4: cmt←-0 5: for all integer r E integers [r1,r2,...]do 6: sum←-sum+T 7: cnt←-cmt+1 8: EMIT(string t,pair (sum,cnt)) Separate sum and count 1:class REDUCER 2: method REDUCE(string t,pairs [(s1,c1),(s2,c2)...]) 3: sum←-0 4: cmt←-0 5: for all pair (s,c)E pairs [(s1,c1),(s2,c2)...]do 6: sum←-sum+s 7: cnt←-cnt+c 8: Tavg←-sum/cnt 9: EMIT(string t,integer ravg) Why doesn't this work?Computing the Mean: Version 2 Why doesn’t this work?