Solve the Problem $3 \frac { 1 } { 2 }$

Solve the problem.
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Six posts are used to support a fence. Each post is $3 \frac { 1 } { 2 }$ inches wide and the posts are evenly spaced.
If the width of the fence is 387 inches, how much space is between each post?

A) $63 \frac { 1 } { 2 }$ inches
B) $77 \frac { 2 } { 5 }$ inches
C) $64 \frac { 1 } { 2 }$ inches
D) $73 \frac { 1 } { 5 }$ inches