Shall we try another riddle?

'Cause I'm gonna post some!

1. Du have two coins in your hand. The sum of the money is thirty cents. One of the coins is not a quarter. That coins are they?

2. If the vice president died, who would be the president?

3. Lee's parents have five children. Four of them are named Li, Lai, Lo, and Lu. What is the name of the fifth child?

4. I have many feathers to help me fly. I have a body and head, but I'm not alive. It is your strength which determines how far I go. Du can hold me in your hand, but I'm never thrown. What am I?

5. A farmer has to carry a fox, a chicken, and a bag of grain across a river. He only has one boot that can only hold two things at once, including the farmer. The farmer will have to carry the fox, the chicken, and the grain across on separate trips. However, if he leaves the fuchs and the chicken alone together, even for a moment, the fuchs will eat the chicken. If he leaves the chicken and the grain alone together, even for a moment, the chicken will eat the grain. How does the farmer get all three across the river without anything getting eaten?