i found out how to do it! Right, so first for i) tangent,
1. You differentiate x^2=4y, which will give you a gradient of p.
2. Use the equation formula (y-y1)=m(x-x1)
and place the first points in (2p, p^2)
this will give you an equation of y=px - p^2
Then do this step again, except with...