Let c be the curve defined by (x²)y = 4. Which of the following statements is true of curve c at the point (2, 1)?
1) The slope of the curve at the point (2, 1) is 1/4
2) The curve c passes through the point (2, 1)
3) The curve c is a parabola
4) The equation of the tangent line to the curve c at the point (2, 1) is y = 2x - 3
