2. The depth of water, d, in metres, varies with the tides throughout the day and can be modeled by the equation D(t) = 2.5cos(0.675(t 3.5)) + 4.3, where t is the number of hours past 12am. a. Jaya claims that the depth is overall increasing from 8am to 11am by 0.15m per hour. Is Jaya's claim, correct? Describe and explain the steps you would take to check Jaya's claim. Use terminology and formulae learned in this unit. Provide calculations as needed. [2] b. Abithan claims that at exactly 10am, the depth is decreasing by 0.5m per hour. Is Abithan's claim, correct? Describe and explain the steps you would take to check Abithan's claim. Use terminology and formulae learned in this unit. Provide calculations as needed