Table:
text: German submarine U-502
Summary of raiding history
Summary of raiding history
Date_ Name_ Nationality Tonnage_GRT Fate_
9 June 1942 Bruxelles Belgium 5085 Sunk
9 June 1942 Franklin K. Lane United States 6589 Sunk
15 June 1942 Cold Harbor Panama 5010 Sunk
15 June 1942 Scottsburg United States 8010 Sunk
15 June 1942 West Hardaway United States 5702 Sunk

text: German submarine U-502
Summary of raiding history
Summary of raiding history
Date_ Name_ Nationality Tonnage_GRT Fate_
7 October 1941 Svend Foyn United Kingdom 14795 Damaged
16 February 1942 Monagas Venezuela 2650 Sunk
16 February 1942 San Nicholas United Kingdom 2391 Sunk
16 February 1942 Tia Juana United Kingdom 2395 Sunk
22 February 1942 J.N.Pew United States 9033 Sunk
23 February 1942 Sun United States 9002 Damaged
23 February 1942 Thalia Panama 8329 Sunk
11 May 1942 Cape of Good Hope United Kingdom 4963 Sunk
24 May 1942 Gonçalves Dias Brazil 4996 Sunk
28 May 1942 Alcoa Pilgrim United States 6759 Sunk
3 June 1942 M.F. Ellliot United States 6940 Sunk

Question: How many submarines were sunk by the German submarine U-502?