Given $f(x) = x^4 − x^3$:

1. Find the equation of the tangent line at $(1, 0)$.

   Hint (a):

   Use the point-slope formula.

   Hint 2(a):

   Use $f^\prime(x)$ to find the slope at $x = 1$. You already know the point.

2. Find the equation of the line normal to the tangent at $(1, 0)$.

   Hint (b):

   Normal lines are means perpendicular to the tangent line at the point of tangency.

3. Find all points on $f(x)$ with the same slope as in part (b).

   Steps (c):

   Let $f(x) =$ the slope in part (b). Solve for $x$. Then find the corresponding $y$-value(s). Write your answer(s) as coordinate point(s).