Question about 2-month study plan

Hi!
I just had a quick question about the 2-month study plan: I just started week 2 today, and I’m noticing that unlike in week 1, most of the Manhattan practice problems are optional. Should I skip them if I’m doing okay on Greg’s quant series practice videos or is it better for me to do them?

Thanks!

I am on Week 2 as well and did not want to skip many of the optional exercises since my quant is quite weak and I needed the practice.