trying to print this need help (2 replies)

I'm trying to make this rc car on thingiverse

If u download and inspect plate number 1 I don't see how the 4 matching pieces are printable? I've tried 3 times now how do you print a part that is suspended in mid air with nothing to bridge itself to? Is this even possible?

Also other issue is on plate number 3 or 4 there are 4 pieces that in mid air someone said there is a way to fix it from reading the comments on the thingiverse page but I don't know how to do that I got the other parts printed already so could really use some help