How do you correctly change the adjective 'petit' (small) to agree with a feminine noun in French?

What is the correct plural form of the adjective 'heureux' (happy) when referring to a group of females in French?

What is the feminine singular form of the adjective 'grand' (tall) in French?

When describing a group of boys and girls together in French, which form of the adjective 'jaloux' (jealous) should you use?

How do you change the adjective 'génial' (great) to agree with a singular feminine noun in French?

Which form of the adjective 'intelligent' (intelligent) would you use for a group of intelligent girls in French?

What is the correct feminine plural form of the adjective 'rouge' (red) in French?