need some vector calculus help?

Question

http://docs.google.com/Doc?id=dgmbvt73_3cxtc95

the problem is at the link above. i though i was just supposed to take the integral from 0 to 1 of each parametric equation but my answers are not coming out like any of the answers given. Not sure what i'm doing wrong. thanks for any help

Answer 1

choice 4 is the answer

integrate one by one
the first one is arctant from 0 to 1 , gives 4
the second integral gives ln(1+t^2) from 0 to 1
for the third one, write it as A/1+t)+B/(1+t^2)

Answer 2

Choice 6 is the answer.

4 * arctan(1) = pi

ln(1+1) = ln(2)

-2 / (1+t) = -1 + 2 = 1