Answer this riddle and request for any java game or app that u want
NOTE: EACH RIDDLES FOR JAVA GAME AND APP RIDDLE SO IF YOU ANSWERED THE FOUR RIDDLES THEN YOU REQUEST FOR FOUR JAVA GAME OR APP THAT U NEED AND WISHING U GOOD LUCK THANKS, BY: GISMALA, NICK: ABUH

1-what can fill a room but takes up no space?
2-what belongs to you but everyone else uses it?
3-iam four times as old as my daughter , in 20 Years's time i shall be twice as old as her. How old are we now?
4-if a red house is made of red brick and yellow house of yellow brick so what of green house made of?