Yes, you will be able to finish the 1st round.
That said, if you did poorly in the 1st, you are going to have to shine in the second.
Please get a coach.
The offer is worth hundreds of thousands of dollars. If a coach can get you even an 10% higher chance of getting the offer that's worth tens of thousands of dollars.
If you did really poorly in the 1st and only have a week, you need a personal trainer to get in shape in time!
Here's some reading to potentially help: https://www.preplounge.com/en/articles/pitfalls-case-interview-preparation