I think he could win everything but the 800, but he'd make the 800 final. He'd be smart to jog the 800 and get last and conserve energy for the 5k. Every race his strategy would be to sit and kick to conserve energy. And the strategy of the field would be to set a hot pace to run the kick out of him.
I remember my HS coach telling me that one year there was a kid that ran 1500, 800, and 3k at some big track invite. His team had a chance to win the meet, and this meet had prelims in the 1500 and 800 on day one and all finals on day two. On day two he wins the 1500m. Then the 800 is only 20-30 minutes before the 3k. To maximize points for his team, he jogs the 800 in 4:00 and gets last (8th) but gets 1 point for his team. Then he goes on to win the 3k. His team won the team battle by 1 point. Other coaches were furious when he jogged the 800, but he realized that winning the 3k was going to get him more points than racing hard and only getting 2-3 points in the 800 and being too tired in the 3k from the hard 800 and only getting like 3-4 points. So that's to say, Jakob would be wise to make the 800 final then jog it to maximize team points in this hypothetical scenario.