Using the large sample confidence interval formula for ???????? − ????????, compute a 95%

(a) lower bound confidence interval for ???????? − ???????? when ???????? = 60, ???????? = 52, ˆ???????? = 0.37, and ˆ???????? = 0.44.

(b) lower bound confidence interval for ???????? − ???????? when ???????? = 100, ???????? = 150, ˆ???????? = 0.74, and ˆ???????? = 0.62.

(c) upper bound confidence interval for ???????? − ???????? when ???????? = 198, ???????? = 212, ˆ???????? = 0.28, and ˆ???????? = 0.19.

(d) upper bound confidence interval for ???????? − ???????? when ???????? = 300, ???????? = 300, ˆ???????? = 0.65, and ˆ???????? = 0.51.