Dear tutors please help me.

I only have 4 0 mins, so please do not put explanation. Just show your work and answer. Please don't forget to highlight an answer!!

Always appreciate for your helps.

And here is my question:

A thin metal wire is in the shape of a quarter-circle of radius 2 (see C1 in figure below) followed by a straight line segment from (0, 2, 0) to (0, 0, 2) (see C2 in figure below). . The equation for C1 is a2 + y2 = 4 where z = 0, 0