Can you explain in detail how to get these answers step by step for each answer? I appreciate y'all!

A tank is leaking at an increasing rate as indicated by the data below. Use the table to answer the following questions. Time (hr) 0 1 2 3 4 5 6 7 8 Leakage (gal/hr) 30 70 150 240 310 410 550 600 720 An upper limit estimate for the amount of material leaked after 4 hours is 770 gal. (Simplify your answer.) A lower limit estimate for the amount of material leaked after 4 hours is 490 gal. (Simplify your answer.) An upper limit estimate for the amount of material leaked after 8 hours is 3050 gal. (Simplify your answer.) A lower limit estimate for the amount of material leaked after 8 hours is 2360 gal. (Simplify your answer.) If the leakage occurs at a constant rate of 720 gal/hr after 8 hours and the tank initially held 20,000 gallons of material, an estimate for the least amount of time for the tank to empty is 31.5 hr. (Round to the nearest tenth as needed.) If the leakage occurs at a constant rate of 720 gal/hr after 8 hours and the tank initially held 20,000 gallons of material, an estimate for the most amount of time for the tank to empty is 32.5 hr. (Round to the nearest tenth as needed.)