So here it says provide names of the alkyl groups below. Alright, so these are alkyl groups because they're attached to something else, which we don't know. So we know they're going to end with YL. Now their prefix name is based on the number of carbons present.
Remember, lines connect carbons together, so this one here has 1234 carbons present. The prefix would be, but, so this will represent a butyl alkyl group. For the next one we have How many carbons? 123-456 carbons means that our prefix is hex, so the alkyl group is hexel, so this is a hexo alkyl group.