amendment to text for question 3(c)

There's another text bit which is unclear from my side, unfortunately. For 3(c), I had "with n = 100 and with true value \tau_\true = 66" in my manuscript, but somehow the "n = 100" part disappeared; mea culpa. So please put in n = 100 if you see this. Students will get credit here as long as they do something reasonable.