(10 points) Problem 1. Test of skills by using Vensim. (4 points) How long does it take to reach the equilibrium point? Please show graph of the simulation result. (2 points) Explain why the Stock S does never reach the Desired Stock Ss since it a balancing process. (4 points) Modify the structure of model to finally achieve the Goal and reach the Desired Stock. Stock S Acquisition Rate AR Lost Rate LR Adjustment for Stock AS Desired Acquisition Rate DAR Stock Adjustment Time SAT Desired Stock Ss Figure 2 Stock control model Vensim equations: Acquisition Rate AR= MAX(Desired Acquisition Rate DAR, O) Adjustment for Stock AS= (Desired Stock Ss-Stock S)/Stock Adjustment Time SAT Desired Acquisition Rate DAR= Adjustment for Stock AS Desired Stock Ss=100 Lost Rate LR= 5 Stock Adjustment Time SAT=3 Stock S= INTEG (Acquisition Rate AR-Lost Rate LR, 100) (10 points) Problem 1. Test of skills by using Vensim. (4 points) How long does it take to reach the equilibrium point? Please show graph of the simulation result. (2 points) Explain why the Stock S does never reach the Desired Stock Ss since it a balancing process. (4 points) Modify the structure of model to finally achieve the Goal and reach the Desired Stock. Stock S Acquisition Rate AR Lost Rate LR Adjustment for Stock AS Desired Acquisition Rate DAR Stock Adjustment Time SAT Desired Stock Ss Figure 2 Stock control model Vensim equations: Acquisition Rate AR= MAX(Desired Acquisition Rate DAR, O) Adjustment for Stock AS= (Desired Stock Ss-Stock S)/Stock Adjustment Time SAT Desired Acquisition Rate DAR= Adjustment for Stock AS Desired Stock Ss=100 Lost Rate LR= 5 Stock Adjustment Time SAT=3 Stock S= INTEG (Acquisition Rate AR-Lost Rate LR, 100)