Curves 72 and 74 terminate at points 83 and 84, {HEAD ~ their respective intersections} with {TAIL ~ axes} 80 and 79 respectively 
with
Curves 72 and 74 terminate at points 83 and 84 , { HEAD ~ their respective intersections } with { TAIL ~ axes } 80 and 79 respectively
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH