The field is 54' across (section 2.2.1).
The pyramid starts 108" away from mid-field (drawing, link below which is referenced in 2.2.1)
The pyramid base is 94" across (section 2.2.5).
Use some math for the exact answer, and tbh you should verify that these #'s are correct too. You have to derive this information from what you're given. I can't tell if the GDC intentionally forces teams to do this (since it's what happens in the real world) or if they don't want to have trouble maintaining dimensions in many different spots as the rules reference drawings.
Drawings, FE-00036 page 5