The Segment of Wire (Total Length = 6R,including the Incoming $\frac { \mu _ { 0 } I } { 8 R }$

Multiple Choice

The segment of wire (total length = 6R,including the incoming and outgoing portions of the wire) is formed into the shape shown and carries a current I.What is the magnitude of the resulting magnetic field at the point P?

A) $\frac { \mu _ { 0 } I } { 8 R }$
B) $\frac { \mu _ { 0 } I } { 2 R }$
C) $\frac { \mu _ { 0 } I } { 4 R }$
D) $\frac { \mu _ { 0 } I } { 2 \pi R }$
E) $\frac { \mu _ { 0 } \pi I } { 8 R }$