using four eights (8) and a one (1) and one mathematical symbol , create the number 100

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

Through your logical capabilities, can you make 7 an even?

What has many teeth, but cannot bite?

What has 13 hearts but no other organs?

Peter wakes up daily to pick up his cycle and crosses the border between Spain and France daily with a bag on his shoulder. He is investigated daily by the officials but they don't find anything suspicious.

If we tell you that he is smuggling something what would it be?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Can you identify if it's a murder or a suicide ?