All you have to do is rewrite you idea in your hypothesis.
(a)
We have been given an equation
. Upon taking derivative of this equation with respect to x on both the sides, we get:

(b)
In order to write the equation of tangent line, we need to find the slope of the line. We know that point (3,11) lies on the graph. Therefore, we write the slope of the tangent as:

Therefore, equation of tangent line is:

(c)
We know that slope of tangent is given as
. The tangent will be vertical when denominator of slope is zero, that is:

Answer:
things you want to accomplish ----> Goals
selecting from available options----> decision making
things to help you achieve your goals----> resources
ranking tasks in their order of importance----> Prioritizing
Maybe it not meant to be or it complicated