Table:
text: Economy of Greece
Largest companies
Forbes Global 2000
Rank_ Company Revenues_US_billion Profit_US_billion Assets_US_billion Market_value_US_billion
1 National Bank of Greece 10.4 -16 137 1
2 Bank of Greece 5.4 0.3 210.7 0.4
3 Coca Cola HBC 9.3 0.3 9.5 10.2
4 Hellenic Telecom 6.2 0.6 10.7 3.7
5 Alpha Bank 4.6 -1.4 76.9 0.5
6 Public Power Corporation 7.7 0 21.2 2
7 Piraeus Bank 3.9 -8.6 62.5 0.3
8 Hellenic Petroleum 13.8 0.1 9.7 3.3
9 OPAP 5.2 0.7 2.3 2.8
10 Motor Oil 12.8 0.1 3.4 1.2

Question: What are the smallest assets with a Piraeus Bank company and turnover (billion US dollars) less than 3.9 among the largest companies in the Greek economy by Forbes Global 2000?