Gerry likes driving small cars and buys nearly identical ones whenever the old one needs replacing. Typically, he trades in his old car for a new one costing about $ XXXXXXXXXXA new car warranty...

Gerry likes driving small cars and buys nearly identical ones whenever the old one needs replacing. Typically, he trades in his old car for a new one costing about $15 000. A new car warranty covers all repair costs above standard maintenance (standard maintenance costs are constant over the life of the car) for the first two years. PART A: After two years, his records show an average repair expense (over standard maintenance) of $2500 in the third year (at the end of the year), increasing by 50 percent per year thereafter. If a 30 percent declining-balance depreciation rate is used to estimate salvage values and interest is 8 percent, how often should Gerry get a new car with this cost in the third year? PART B: After two years, his records show an average repair expense (over standard maintenance) of $1500 in the third year (at the end of the year), increasing by 50 percent per year thereafter. If a 30 percent declining-balance depreciation rate is used to estimate salvage values and interest is 8 percent, how often should Gerry get a new car with this cost in the third year?