Why scarcity and choice are basic economic problems faced by every Society??

HELP PLEASE

You manage an equity fund with an expected risk premium of 10% and a standard deviation of 14%. the rate on treasury bills is 6%. your client chooses to invest $60,000 of her portfolio in your equity fund and $40,000 in a t-bill money market fund. what is the expected return and standard deviation of return on your client’s portfolio?

"in my opinion, we ought to stop making our own drums and accept that outside supplier's offer," said wim niewindt, managing director of antilles refining, n.v., of aruba. "at a price of $21 per drum, we would be paying $4.70 less than it costs us to manufacture the drums in our own plant. since we use 70,000 drums a year, that would be an annual cost savings of $329,000." antilles refining's current cost to manufacture one drum is given below (based on 70,000 drums per year):

You are attending college in the fall and you need to purchase a computer. you must finance the purchase because your parents will not purchase it for you, and you do not have the cash on hand to purchase it. in blank #1 determine which type of credit would you use to finance your purchase (installment, non-installment, or revolving credit). (2 points) in blank #2 defend your credit choice by explaining why your financing option is the best option for you. (2 points) in blank #3 explain why you selected that credit option over the other two options available. (2 points)