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Rizzo Restaurants disclosed the following PP&E information in its financial statement notes for the most recent two-year period: Land Buildings Equipment Construction in progress Total PP&E Accumulated depreciation PP&E, net Depreciation expense 12/31/Yearl S 100 1,000 400 50 $1,550 12/31/Year2 S 100 850 350 50 $1,350 150 $1,200 50 (200 $1,350 The estimated average useful life is a. 26.0 years. b. 29.0 years. C. 22.5 years. d. 25.5 years