3. A parking garage owner requires snow removal at her garage. The number of days per year requiring snow removal is shown in the table below. Contracting for snow removal cost $500 per day. She can purchase snow removal equipment for $40,000. Useful life is 10 years, no salvage value. Operating and maintenance costs are $14,000 annually and MARR is 10% # OF DAYS COST PROBABILITY 20 $10,000 0.15 40 $20,000 0.15 60 $30,000 0.35 80 $40,000 0.30 100 $50,000 0.05 a. What is the expected value of the present value of the savings of this snow removal equipment. QUESTION 12 3b. What is the standard deviation of the present value of the savings of this snow removal equipment QUESTION 13 c. What is the probability that the device will result in no savings