Person is correct that [HORIZONTAL] stripes make you look wider, but that doesn't necessarily mean fatter. HORIZONTAL stripes in the chest area will draw the eyes outwards, which will give the illusion of a wider chest. Avoid horizontal stripes in general for your body for areas you do not want to be widened. VERTICAL stripes in general lengthen the body upwards; the look good if you're aiming to look leaner, taller, skinnier, etc.
Yes. I have a black and white striped bikini top and it makes my boobs look bigger. It's a neat illusion.
Yes strips do give the illusion that you have big boobs especially if your wearing a scoop neck top.
your boobs are most excellent
No it will just make you look wider (fat.) Unless you are super skinny (like Taylor Swift) avoid anything with horizontal stripes.