Due to some destinations being remote and there only being one access road in/out, if you stop at D4 then you must stop at both D9 and D10. For this same reason, it you decide to stop at both D9 and D10 you must also stop at 04. Which constraint(s) will ensure that this occurs: D4 2 D9 + D10 - 1 and 2*D4 2 D9 + D10 D4 + 1 2 D9 + D10 and D9 + D10 2 2*D4 D4 D9 + D10 - 1 2 D4 D9 + D10 D4 + 1 D9 + D10 Despite the current international travel restrictions imposed due to the Covid-19 pandemic, you are optimistic that Ontario will no longer be in lockdown by the summer and are planning a road trip to Western Canada. You have identified the top 10 destinations that you would like to stop and see along the way (D1, D2, D3, D4 D5, D6, D8, D9, and D10). Unfortunately, some of the destinations are very fat apart and you cannot see them all due to time restrictions. Define Di - 1 f you stop at destination I, and Di -0 otherwise, where i - 1, 2, ... . 10