Please describe how you got those answer please!

-0.3333x^3+10.4972x^2-106.9664x+454.8683 R(2) = _Units: Revenue for IBM You should type the function you indicated above into GeoGebra's graph- ing mode to work with for the remainder of the problem. 2. Supposing this model was valid through 2016, use it to find IBM's rev- enue as of Jan 1, 2016. Include the appropriate input and output values and units for the output value. Round your answer to the nearest cent. Write a sentence summarizing this information. R( 6 = $118.9763 billion _Units: Revenue for IBM 3. Using GeoGebra, find IBM's marginal revenue function. Write the func- tion below, using 4 decimal places for the coefficients (you may need to change the settings). Include the units for the MR(1)-values. Then find IBM's marginal revenue as of Jan 1, 2010, rounded to two decimal places. Again include the appropriate input and output values and units for the output value. Write a sentence to interpret this value. MR(1) = -1x^2+20.99x-106.97 Units: Marginal revenue function for IBM MR 10 ) = 2.93 billion Units: Marginal revenue for IBM after 10 4. Use GeoGebra to find the critical numbers for IBM's revenue function 3 correct to 3 decimal places. There should be 2 of them. Then write down the month and year each of these correspond to. Note that you will need to round up for the month. For example, .2 year = 2.4 months which puts you in March. Critical Number 1: Month Year Critical Number 2: Month Year With help from GeoGebra, fill in the sign chart for IBM's marginal revenue function below. Make sure you label each critical number next = " below each of the excessively large hash marks on the number line. Also, indicate the sign of the derivative by writing either ">0 or 0 or