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