How to solve question 1a? very confused?

A)



b)

recall that the is the equation of the tangent line at (1,0), whose slope is 3 of course, now, the normal will be the line that's perpendicular to the tangent line, and therefore it will have a slope that is negative reciprocal to the tangen't line's slope, thus



now, for the second bit there,

The answer is c. 7 (i think) i’m almost sure though