PQ is a double ordinate of the parabola $y^2=4x$ which passes through the focus S. $\Delta PQA$ is isosceles right angled triangle where A is on the axis of the parabola. Line PA meets the parabola at C and QA meets the parabola at B. Which of the following statement(s) is(are) CORRECT.

$P(1,2)Q(1,-2)$ 
 
$\Delta PAQ$ is right
Angled isosceles
Slope of PA = –1, QA = 1
Equation of PA is x + y – 3 = 0
Equation of QB is x – y – 3 = 0
On solving with parabola we get B, C as (9, 6), (9,  6) respectively
Area of trapezium PBCQ = 64
Circum radius of $PBCQ=2\sqrt{10}$ 
In radius of $\Delta APQ=\sqrt{2}-1$  
In radius of $\Delta ABC=3(\sqrt{2}-1)$