Hard STEP3 papers/questions ?

I am suck at vectors/summation series/graph sketching
I assume i will manage to fix most of this by doing more of a specific questions
But there is like 2 months before a paper and i really want to know what to expect so i think it is the time of practicing hardest papers .
I have done 2018 to 2014 inclusively + some random questions
So far i think i will be abe to do 2 question out of the paper but assuming i wont be loosing much marks.
Yeah i might do some mechanics questions so it isnt terrible but i realy want to increase my odds.So any hard questions/papers as a suggestion would be nice