Lim Wong.

b) In response to your letter dated March 28, we inform you that the cost of repairing the Nanopositioning systems, regardless of the type of work, is estimated at 4500 US dollars. We value your trust in our company and inform you that your current system is out of date and it would be better to replace it with a new one. We are sending you a catalogue.

c) Dear Mr. Lee,

d) Nano Equipment

1004 Toa Payoh N,

Singapore 318995

e) The Technical University of Seoul,

34 Hongdae Street, 100-021 Seoul, South Korea

11 November, 2019