)Use Tables, or otherwise, to evaluate log4 ecos 3x dr. Simplify your answer. b)Use a u-substitution to evaluate el-rdx. () Determine the value of a >0 such that11a2-9xd=-3(d)(i) very simple model for quarantine-li- Covid–19 spread in city says that the rate of spread of the disease is proportional to the product of the number of persons infected and the number of persons available to be, but yet to be, infected Let the total population of the city be P persons and let N be the number infected at time t. We assume that quarantine results in limited number L of persons who have any possibility of being exposed to infection, where L <

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