Halyburton Park Bonus Cache Mystery Cache

The geocache is not at the posted coordinates. To determine the final coordinates you will need to first visit the five locations in the Adventure Lab "Halyburton Park Trails" (https://adventurelab.page.link/AtPe) to get the needed values for A, B, C, D, E, F, G, H, J and K. The final coordinates are in the following format:
N 34° 10.pqr' W 77° 54.xyz'

where p = D + K

            q = B - J

            r = F + J

            x = C - A

            y = F - J

            z = H + (G×E)

================================================