Answer Puzzle 5

[5]
[First]
Losing two microbubbles every in three gained when processing on means that only one microbubble is gained every nanosecond. Thirty microbubbles are needed to gain one usable bubble. The answer then is twenty eight nanoseconds, not thirty, because when the thirtieth microbubble is achieved there is no need to process any further, and the two microbubbles are not then lost.