A tunnel with a rectangular cross$-$section has been excavated horizontally in a north easterly direction at a width of $5$ m and

height of $3$ m and on a bearing of $68$ to true North. A joint is visible at floor level in the North Western wall of the tunnel $6$ m back

from the face of the tunnel. The joint reaches the roof of the tunnel at $1\mathrm{.}7$ m from the face of the tunnel. It is also visible in the roof

and intersects the face $2\mathrm{.}8$ m from the north western wall.

What is the strike direction of the joint?

NOTE: PLEASE ODNT EXPLAIN THE THEORY MUCH AS I NEED AN ACTUAL ANSWER. Previous solutions from Chegg only explain but never actually provide a calculated solution $-$ please leave a solution thank you