pls I need help with these questions

1. A wire oriented along the z-axis carries a current of 6.00 A. It is found that the line integral of the magnetic field along a square loop of side length boriented in the x-y plane and centered at the wire is 10 T m. What is the line integral if the length of the square loop is changed to 2 b.

30 T m. 2.5 T m. 20 T m. 10 T m.

2. Calcualte the magnetic field strength at point P. The current, I, is 5.00 A, the angle is 24.6 and the radius, R, is 3.40 cm.

R P