I need help with these three questions:

a) It costs $100 to enter the following game of chance based on the outcome of a coin toss(fair coin). If the coin comes up'heads,' you walk away with $12. However, if the coin comes up'tails,' you walk away with $85. What is the expected return on thisgamble? Please show this as a percentage and round to 2 decimal places.

b) True orFalse? It is possible to hold a portfolio where the risk of the whole portfolio is lower than the risk of any asset within it.

c) What is another name for unsystematicrisk?

A.

Specific Risk

B.

Non-Diversifiable Risk

C.

Market Risk

D.

Total Risk

E.

Firm-Specific risk

I think it is a. Specific risk but I would like to double check.

Thank you.