Based on the scenario in question 5, determine the amount of time it would take for Mr. Yao to clean a shelf. a. 30 minutes b. 90 minutes c. 60 minutes d. 20 minutes e. 15 minutes x Based on the scenario in question 3, determine the amount of time it would take for them to shovel the sidewalk together. a. 60 minutes b. 30 minutes c. 15 minutes d. 90 minutes e. 20 minutes

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