Answer:
a)

With
the proportion associated to the workers and
the proportion for the bosses
b)

With

Explanation:
Part a
For this case we define the parameter of interest is the difference between the proportion of workers that say monitoring employee e-mail is unethical and the proportion of bosses that say monitoring employee e-mail is unethical
So the parameter can be expressed like this:

With
the proportion associated to the workers and
the proportion for the bosses
Part b
For this case we want to find the distribution for

The estimated proportions for this case are:


We can assume that these estimators represnent unbiased estimators for the real parameter so then the distribution for the difference in the proportions can be assumed like this:

With
