Please, help me

1. Find a square which limited the polar curve r = 7(1- sin(fi)), -pi/6 =< fi =< pi/6.

2. Find a length of the curve y = 2 + ln(x), sqrt(3) =< x =< sqrt(8).

For me these problems have been the most difficult some of them, I began to deal with, but my answers were not correct.

Tell me please, what program would be easier to do the drawings for these tasks.

Thank advance!