Are Booming Blade and Green-Flame Blade compatible with extra attack?

Can you elect to not hit a second target with Geen Flame Blade even if one is in range?

Swashbuckler 3rd level casting Greenflame Blade – does it work with Fancy Footwork?

If my Green-Flame Blade is Counterspelled, do I still get to make a normal melee attack

Does Spell Sniper feat grant 10 ft range to touch spells?

Does the extra attack allow you to cast Green Flame Blade and make the second attack?