Logic Riddles

Question: You are in a car with your friend and your car ran out of gas. You went to the gas station to go pick up some gas. You told your friend to close all the windows and don't turn the radio on. Your friend turned the radio on and the radio was the news reporting there is a murderer in town. Your friend looked up and saw the murderer. The murderer killed your friend. How is this possible?

Question: (1) What am I and (2) how do you spell it?

Question: What's a plate when it has three spoons in it?

Question: What goes up white and comes down yellow?

Question: He Knows Everything!! But No one Knows him!!!