The motion of a point on a plane curve is described parametrically by x=t2 and y=t3−t, where t is a real parameter.
a. (i) Derive an expression for dxdy in terms of t.
b. (ii) Find the slope of the tangent to the curve at the point corresponding to t=1.
c. (iii) Determine the equations of both the tangent and the normal at this point in Cartesian form.