The one on the left looks like nimblewill and the one to the right might be a ryegrass. The third is Bermuda grass. The fourth might be a crabgrass relative but the photo doesn't show the features needed to make an ID.
Ryegrass, Poa annua, and crabgrass and its relatives can easily be killed in one spray with glyphosate. Nimblewill and Bermuda grass will require constant applications every 3-4 weeks all season long to knock it back. Don't bother with those organic acid sprays. If the plant has any underground stem, it just burns the top off and the underground stem allows it to continue growing.
Nutsedge is best treated with Sedgehammer. Dismiss NXT will knock it back faster (more expensive) and you can combine Tenacity with the two previous products for better control. (multiple applications)
If you want to save money, buy the professional product that comes with one of the best surfactants: