Please help me in figuring out where I went wrong in the formula on question 1. The answer in parenthesis is the right answer. Please type out step by step so I can follow:

1.Trevi Corporation recently reported an EBITDA of $31,600 and $9,500 of net income. The company has $6,600 interest expense, and the corporate tax rate is 35 percent. What was the companys depreciation and amortization expense? Answer: 10,576.92 (10,384.62) Hide Feedback SOLUTION: 1. EBT = {NI}/(1-.35) 2. EBIT = EBT + {IE} 3. {EB} - EBIT =DA

If there is a way to do this problem in excel (I know there is a covariance function), I'd like to see that. If not, by hand is also helpful:

2.Given the returns and probabilities for the three possible states listed here, calculate the covariance between the returns of Stock A and Stock B. For convenience, assume that the expected returns of Stock A and Stock B are 0.09 and 0.18, respectively. (Round your answer to 4 decimal places. For example .1244) Probability Return(A) Return(B) Good 0.35 0.30 0.50 OK 0.50 0.10 0.10 Poor 0.15 -0.25 -0.30