score:3
It's technically feasible but unless you want to spend all you time driving with only time to take a picture at each location, maybe drop one.
Antelope and Zion are quite far from Las Vegas and would be a long day trip them selves. Even Grand Canyon from Las Vegas is an entire day.
There are a number of operators that do guided (by bus) excursions to Grand Canyon from Las Vegas. Zion probably as well, but I've not seen those specifically.
Staying in Tusayan, being on the south rim of the canyon, won't make much difference since that ~5hr drive from Las Vegas on it's own.
Because of the distance, you have 14 Feb and 15 Feb to do one location each. 16 Feb, you'll need to leave mid morning to return to LAS.