ios - I'm confused on all the screenshots required for App Store submission, and how to get them -

this stackoverflow post has sizes, itunes connect app properties.

however, don't quite understand sizes required.

my app 4s, 5, 6, 6+. technically run on ipad.

i take full advantage of app store allows, , submit 5 screenshots.

am correct in thing required, 3.5 , 4 inch retina screenshots? or without status bar? sounds decision me, correct?

it mentions if app 'optimized iphone 6 or 6+'. this? app optimized iphone 6. should mark or leave open?

i submit 5 different screenshots (portrait only). include status bar. sounds need submit 5 3.5" retina display (640x960), 5 4" retina display (640x1136), 5 4.7" retina display (750x1334), , 5 5.5" retina display (1242x2208). none ipad, since app iphone only. correct?

are screenshots taken via ios simulator acceptable submission? there way standardize battery powers , times same, since take 10 minutes take these 20 screenshots?

yoy can take screenshots simulator status bar. approved appstore. better way make screenshots in image editor( ps,skatch , other). u must make @ least 3 screenshots screen(4,5,6,6+).