Some rock units display massive solve graphically, for reference the scale at the bottom is 3.5cm.

edit: this question was flagged as needs more info but thats all i have. i bought a used book so there are some pencil markings but all that figure 3-m1 is showing is the 3 rock unit locations and the number next to them is their elevation

edit 2: the diagram is not unclear, i have provided all the information i have, and my question was flagged because someone underqualified doesn't understand. chegg unflag my question, there is certainly enough information