Imagine a number line. Your mark is at 1. Then, you move to the left four times. That leaves you with the result of -3. Hope that helps.
I think estufa makes more sense, because there are usually stoves in kitchens, as opposed to sofas and cars, and it's a better answer then a place to sit down.
Hope this helped!
Answer:
p
i
p
i
p
i
p
i
i
son de pretérito y imperfecto
