Figure below is from the ATM system we discussed in class on fundamentals and mechanics of Discrete$-$Event Simulation. Assume the system below used different random numbers, from the example we studied in class, for the inter$-$arrival and ATM processing times. The events at $12\mathrm{.}7$ and $15\mathrm{.}2$ are the last two events we processed in our simulation. Based on the simulation chart below. What will be the ATM usage time $($X$2)$ at $15\mathrm{.}2$ simulation time? $($i$.$e$.$ the total time ATM was busy during the simulation from the very beginning$).$ All times are in minutes. Respond with only a numerical value with a single decimal digit. $($i$.$e$.$ no need to write minutes$).$