Use the following information to answer Questions 2-19. Su…
Use the following information to answer Questions 2-19. Suppose you are leading a team to help H&R Block (a tax preparation company) improve its tax preparation service process. After several field trips to the company, you decided that tax preparation process consists of two activities: (i) preparing necessary documents (DocPrep, hereafter) performed by a team led by Ted, followed by (ii) completing tax return forms (FormPrep, hereafter) performed by a team led by Mary. You built the following model in ExtendSim to simulate this process (also available from Flow chart base model.pdf in case the picture does not show up). Answer Questions 9-11 also considering the following information You showed the simulation model to the operations manager at H&R Block and was told that the model does not consider an important factor—30% of requests take much longer than the others to prepare all necessary documents due to communication issues with the clients. To incorporate this factor in the simulation model, you decided to classify all requests into two categories: hard requests and easy requests. They differ only in that a hard request takes on average 15 min to prepare all necessary documents, whereas an easy request takes only 5 min on average. Assume that the processing time to prepare documents of each type of request follows exponential distribution. You have rebuilt the model as follows (also available from Model 2.pdf). What is the function of the block named “???” (i.e., second from the left)?