A business uses straight-line depreciation to determine the value y of an automobile over an 8-year period. Suppose the original value (when t=0 ) is equal to $29,400 and the salvage value (when t=8 ) is equal to $7000. a. By how much has the automobile depreciated over the 8 years? b. By how much is the value of the automobile reduced at the end of each of the 8 years? c. Write the linear equation that models the value s of this automobile at the end of year t. The automobile has depreciated \$ over the 8 years. (Simplify your answer.)