If you have a 3 gallon cylindrical shaped jug and a 5 gallon cylindrical shaped jug with an unlimited supply of water (and no other containers), which is the correct procedure to end up with exactly 4 gallons in the 5 gallon jug?	
	a. Fill 3 gallon jug. Pour out half of the 3 gallon jug by
	b. Fill 3 gallon jug. Pour it all into the 5 gallon jug twice
	c. Fill 5 gallon jug. Pour all but 2 gallons into the 3 gallon jug
	d. All of the above	
	e. None of the above
The correct answer is: **e. None of the above**.
Write a new option 'f.' which contains the correct procedure to end up with exactly 4 gallons in the 5 gallon jug.
The procedure is as follows:
f. 
1. Fill the 3 gallon jag and pour as much water as possible into the 5 gallon jug twice. There will be 1 gallon left in the 3 gallon jag
2. Empty the 5 gallon jug.  Pour the 1 gallon water in the 3 gallon jug into it.
3. Fill the 3 gallon jug. Pour all into the 5 gallon jug. There will be 1+3=4 gallons in the 5 gallon jug.