please work out the depreciation using diminishing balance method for both vehicles. please show full working

also advise on the accounting and tax treatment of tax

Another investment Sheila is considering is a new work truck. Her old Chevy is expected to last another three years with a $2,000 repair next month. Alternatively, Sheila can sell the truck as is for $3,000 (worthless after three more years of use) and buy a used F150 for $9,000 (expected value of $3,000 at the end of three years). The new truck would be more efficient, saving Sheila an average of $100 per month on repair and fuel costs. Sheila believes she can borrow money for the new truck at an annual rate of 5%. Sheila is wondering what the pros and cons of switching trucks are, and if she should upgrade. She also wants advice on the accounting and tax treatment of a truck. W