\[Let \int_0^x \sqrt{1-\left(y^{\prime}(t)\right)^2} d t=\int_0^x y(t) d t, 0 \leq x \leq 3, y \geq 0, y(0)=0 . Then at x = 2, y’’ + y + 1 equal to (1)1, (2)2, (3)√2, (4) 1/2\]