Answer:
A.
The angles may not be equal
only if the quadratic is inscribed in a circle and this quadratic is determined or said to be a cyclic quadrilateral then we may say that the angles are equal but here it may not.
Answer: I think it’s the one you picked which is D. I might make a mistake, but don’t worry. You will be fine.
Step-by-step explanation: I learnt it at tutoring and not at school.

where

is the CDF for

.
By symmetry of the distribution, you then have
I’m really not sure but 216 because bass multiplied by height multiplied by width (6*6*6)
Where is the diagram?
Can't be solved without it.