QuestionAt a customer support center, the number of service requests received in a day is modeled by a Poisson random variable XX with mean λ=18\lambda=18. The total time spent processing requests and total words written are modeled as T=7X+12T=7X+12 and W=4X−1W=4X-1. Find Cov(T,W)\operatorname{Cov}(T,W).