The figure was created by repeatedly reflecting triangle NMP.

A figure is created by continuously reflecting triangle N M P. The length of side N M is 6 inches, the length of side M P is 4 inches, and the length of side N P is 8 inches.

The scale factor of the dilation of segment HG is One-sixth.

Point P is the center of dilation. Line segment H G is dilated to form shorter line segment H prime G prime. The length of P G prime is 0.5

If PG' equals 0.5 units, what is PG?

2.5 units
3 units
4.5 units
6 units