homework completed

This problem is a little more subtle (and perhaps it is just not clear the way I wrote it!) `ords[c(1,2,3,4)]` are the first four numbers in `ords` that correspond to the first four `github` names in the vector `gnomes` but we want the first 4 that signed up---in other words the four names that correspond to the positions in `ords` where the values in `ords` are less than or equal to 4. You have to look at ords to see those.