The question is:http://i.imgur.com/pB7pm.png

I get (a) 66.1175 rad/s^2 but am stuck right away on (b). It seems to me that (a) and (b) should have the same answer however that is not the case. As for (c) and (d), I haven't been able to get to them yet but it would appreciated if someone could show me their work for (b) => (d).

Thanks in advance!