What is the easiest way to change the phrase 'revenues, profits, gross margin', to read revenues profits and gross margin?

Use the insert mode, position the cursor before the g in gross, then type the word and followed by a space.

Use the insert mode, position the cursot after the g in gross, then type of the word and followed by a space.

Use the overtype mode, position the cursor before the g in gross, then type the word followed by a space.

Use the overtype mode, position the cursor after the g in gross, then type the word the and followed by a space.

None of these.