Urgent help on accounting homework please?

Elton Enterprises has recently upgraded its delivery truck. The various expenditures related to the upgrades occurred at the end of year 2 and are as follows:

Item and amounts	Capital expenditure/Operating expense
1) Oil changes, $20
2) All four tires on truck replaced, $800
3) Engine replacement, $900
4) Changed truck colors from blue to green, $500
5) Replaced brakes, $400

Required:

1) Determine whether the expenditure is a capital improvement or ordinary operating expense.

2) Suppose the delivery truck with an original cost of $35,000 was being depreciated using straight line depreciation over 5 years and was expected to have a $3,000 residual value, however the upgrades are expected to increase the useful life from 5 years to 7 years. Based on the upgrades above, what is the revised depreciation expense for years 3 through 7?