let's check how much is it after 2 years firstly.

Brian invested the money for 6 years, so now let's check how much is that for the remaining 4 years.


1/2 is the probability the coin would land heads up both times.
The answer is none because the square cannot be rotated into a cone or a cylinder. The square would need some sort of a circle to be made into those.
Answer:
350-60
Hope this helps. Have a great day:)