4) The number of widgets a worker can produce can be modeled the function N(t) = 20(t + 1) where t is the t+4 number of days since the worker was trained to make a widget. a) Algebraically, what is the domain of N(t) ? b) Based upon the context of the problem, should there be any additional domain restrictions? c) Find the horizontal asymptote for the function N(t) and interpret the numerical value of the asymptote in the context of the problem. d) Find N(0) and interpret this value in the context of the problem. e) Find the average rate of change of N(t) for a worker during the first 5 days after a worker was trained. Interpret this average rate of change in the context of the