Describe a good way to parallelize each of the following: a. The difference operation b. Aggregation by the count operation c. Aggregation by the count distinct operation d. Aggregation by the avg...

Describe a good way to parallelize each of the following:

a. The difference operation

b. Aggregation by the count operation

c. Aggregation by the count distinct operation

d. Aggregation by the avg operation

e. Left outer join, if the join condition involves only equality

f. Left outer join, if the join condition involves comparisons other than equality

g. Full outer join, if the join condition involves comparisons other than equality.