This question uses the program matlab

Use the following information for problems 1-3 The the oxygen level c (in mg/l) in a river downstream from a sewage discharge pipe is described as: 10-20(e-0.15- 0-0 .5x) where x is the distance downstream in kilometers. Oxygen levels below 5 mg/L are generally harmful to gamefish such as trout and salmon. Use the following information for problems 1-3 The the oxygen level c (in mg/l) in a river downstream from a sewage discharge pipe is described as: 10-20(e-0.15- 0-0 .5x) where x is the distance downstream in kilometers. Oxygen levels below 5 mg/L are generally harmful to gamefish such as trout and salmon