Problem: in the rectangular coordinate system point o has coordinates ( 0,0 ) and point b has coordinates ( 5,5 ) and if point a is equidistant from points o and b and the area of the triangle oab is 16 , which of the following are the possible coordinates of point a . 
Options: ['a ) ( - 2,6 )', 'b ) ( 0,4 )', 'c ) ( 2 , - 6 )', 'd ) ( 2,6 )', 'e ) ( 4,0 )']
d