Table:
text: 1988 West Coast Eagles season
Regular season
Regular season
Round Date_ Score Opponent Opponent_s_Score Result_ Venue Attendance Best_on_ground Team_
1 Saturday, 2 April 2:10pm 14.20 (104) Richmond 11.17 (83) Won by 21 points Kardinia Park (stadium) 20781 Alex Ishchenko West Coast
2 Friday, 8 April 7:40pm 26.19 (175) Essendon 11.10 (76) Won by 99 points WACA Ground 24886 John Gastev West Coast
3 Sunday, 17 April 2:10pm 29.18 (192) Brisbane Bears 10.14 (74) Won by 118 points WACA Ground 16354 Chris Mainwaring West Coast
4 Saturday, 23 April 2:10pm 8.7 (55) Collingwood 13.16 (94) Lost by 87 points Victoria Park 26276 James Manson Collingwood

text: 1988 West Coast Eagles season
Regular season
Regular season
Round Date_ Score Opponent Opponent_s_Score Result_ Venue Attendance Best_on_ground Team_
5 Friday, 29 April 7:40pm 14.16 (100) Footscray 14.9 (93) Won by 7 points WACA Ground 17662 Ross Glendinning West Coast
6 Friday, 6 May 7:40pm 17.8 (110) North Melbourne 17.23 (123) Lost by 13 points Melbourne Cricket Ground 10133 Donald McDonald North Melbourne
7 Friday, 13 May 7:40pm 17.10 (112) St Kilda 3.18 (36) Won by 76 points WACA Ground 12803 Alex Ishchenko West Coast
8 Sunday, 22 May 2:10pm 9.9 (63) Hawthorn 17.14 (116) Lost by 53 points Subiaco Oval 27344 Chris Wittman Hawthorn
9 Sunday, 29 May 2:10pm 12.15 (87) Carlton 15.10 (100) Lost by 13 points Subiaco Oval 27663 Ken Hunter Carlton

text: 1988 West Coast Eagles season
Regular season
Regular season
Round Date_ Score Opponent Opponent_s_Score Result_ Venue Attendance Best_on_ground Team_
10 Sunday, 5 June 2:10pm 10.15 (75) Richmond 16.20 (116) Lost by 41 points Melbourne Cricket Ground 7157 Peter Wilson Richmond
11 Monday, 13 June 2:10pm 10.13 (73) Melbourne 13.15 (93) Lost by 20 points Melbourne Cricket Ground 28045 Alan Johnson Melbourne
12 Sunday, 19 June 2:10pm 8.13 (61) Sydney 14.20 (104) Lost by 43 points Sydney Cricket Ground 12664 Michael Parsons Sydney
13 Sunday, 26 June 2:10pm 17.19 (121) Fitzroy 13.9 (87) Won by 34 points Subiaco Oval 15028 Wally Matera West Coast
14 Saturday, 2 July 2:10pm 13.7 (85) Essendon 16.16 (112) Lost by 27 points Windy Hill 10298 Simon Madden Essendon

text: 1988 West Coast Eagles season
Regular season
Regular season
Round Date_ Score Opponent Opponent_s_Score Result_ Venue Attendance Best_on_ground Team_
15 Sunday, 10 July 2:10pm 18.18 (126) Geelong 16.10 (106) Won by 20 points Subiaco Oval 18537 Chris Mainwaring West Coast
16 Friday, 15 July 7:40pm 14.14 (98) Brisbane Bears 12.17 (89) Won by 9 points WACA Ground 16074 Mark Withers Brisbane Bears
17 Friday, 22 July 7:40pm 8.16 (64) Fitzroy 19.20 (134) Lost by 70 points Melbourne Cricket Ground 7611 John Ironmonger Fitzroy
18 Sunday, 31 July 2:10pm 18.14 (122) Melbourne 11.12 (78) Won by 44 points Subiaco Oval 16266 Murray Rance West Coast
19 Sunday, 7 August 2:10pm 16.9 (115) North Melbourne 12.12 (84) Won by 31 points Subiaco Oval 18193 Guy McKenna West Coast

text: 1988 West Coast Eagles season
Regular season
Regular season
Round Date_ Score Opponent Opponent_s_Score Result_ Venue Attendance Best_on_ground Team_
20 Saturday, 13 August 2:10pm 14.13 (97) St Kilda 13.10 (88) Won by 9 points Moorabbin Oval 11074 Laurie Keene West Coast
21 Sunday, 21 August 7:40pm 16.15 (111) Collingwood 7.9 (51) Won by 60 points Subiaco Oval 36638 Karl Langdon West Coast
22 Sunday, 28 August 2:10pm 7.11 (53) Footscray 3.11 (29) Won by 24 points Western Oval 18456 Chris Mainwaring West Coast
EF Saturday, 3 September 2:10pm 10.11 (71) Melbourne 11.7 (73) Lost by 2 points Waverley Park 43438 – –

Question: How many rounds in the 1988 West Coast Eagles season had more than 20,000 spectators in attendance?

Question: During the 1988 West Coast Eagles season, which venue hosted the only round with more than 40,000 spectators?