Took a one week break, and some other queries

Guys I have my exam so because of which I took a week off from workouts n diet as well so just wanted to know what I can do to get back quickly, or is the timeframe that small that I don't need to worry about anything?

One more thing, I'm 5'11 76 kgs skinny fat, my split is divided in chest, triceps, biceps, back, legs, forearms and shoulders only. Should I include ab workouts in it as well? If yes, how many days a week and on which days should I add it to get the most out of it. For reference my current split is like this

Monday - Chest and triceps

Tuesday - Back, biceps and forearms

Wednesday - Shoulders and legs

repeat for the next three days and Sunday rest