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Number Puzzle #25- Nine Minute Egg -

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Puzzle Image
How can you boil an egg for exactly nine minutes with only a 4-minute hourglass and a 7-minute hourglass to measure the time?

You can use the table below to track the remaining time in each hourglass.


4-Minute Hourglass (minutes remaining) 7-Minute Hourglass (minutes remaining) Elapsed Time (minutes)
- - 0
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Do you have a suggestion for this puzzle (e.g. something that should be mentioned/clarified in the question or solution, bug, typo, etc.)?