Answer:
a. No, the firm needs to take the volatility of short-term rates into account.
Step-by-step explanation:
Short term interest rates are more volatile than the long term interest rates. If the company chooses to finance its operations solely from short term financing than it will need to incorporate the affect of volatility in the short term interest rates to identify the net returns. The volatility should be calculated with the risk factor and required rate of return of the funds.