Given π y=√s²-1-√sec⁻¹g π, evaluate.
a) π s√s²-1-√sec⁻¹g π
b) π s√s²-1-1√sec⁻¹g π
c) π s√s²-1-√sec⁻¹g π
d) π s√s²-1-1√sec⁻¹g π