What Is the Magnitude of the Magnetic Field at Point

What is the magnitude of the magnetic field at point P in the figure if a = 2.0 cm, b = 4.5 cm, and I = 5.0 A?

A) 87 μT, into the paper
B) 87 μT, out of the paper
C) 0.23 mT, out of the paper
D) 0.23 mT, into the paper
E) 23 μT, into the paper