Answer:
On the map, the endpoint of the string of buoys are located at (6,18) and (18,34). The midpoint of the string is located at (12,26). Each anchor is located at the midpoint of one of the two halves of the string of buoys. We can illustrate this using a sketch like this
The first anchor, A1, is located at the midpoint of (6,18) and (12,26):
(6+12/2, 18+26/2)= (9,22)
The second anchor, A2, is located at the midpoint of (12,26) and (18,34) :
(12+18/2, 26/34/2) = ( 15,30)
Explanation: