Suppose that the model of Section 1.2 is used for describing the flow of customers entering a store. We consider all t ∈ [0, ∞). Which function λ(t) should we choose if the store is open from 10am to 6pm, the intensity of arrivals equals c₁ = 1 from 10 am to 2 pm, is linearly growing with a slope of c₂ = 2 from 2 pm to 5 pm, and remains constant during the last hour of the work day. Graph E{N_t} as a function of t for t ∈ [0,24]. How will the graph look for t ∈ [0, ∞)?