Let f(x,y)=0 be the equation of a circle such that f(0,y)=0 has equal real roots and f(x,0)=0 has two distinct real roots. Let g(x,y)=0 be the locus of points ′P′ from where tangents to circle f(x,y)=0 make angle π3 between them and g(x,y)=x2+y2–5x–4y+c,c∈R. Let Q be a point from where tangents drawn to circle g(x,y)=0 are mutually perpendicular. If A,B are the points of contact of tangents drawn from Q to circle g(x,y)=0, then area of triangle QAB is