1. Yes, you are right about E5-E3.
2. In my handout, it is 725 and 800. I would suggest you use either you feel comfortable with and then explain there is a discrepancy.
3. I think from a total expense perspective, Traditional Medical is the cheapest. However, the way I see the cheapest is to consider both Underwriting and Death Benefit at a Per policy level. Although simple is more expensive, but per policy expense it not the highest. Assuming they all charge the same price, then Traditional does not have the highest profit.
Just my own opinion, hope it help.