Table:
text: 1941 VFL season
Round 13
Round 13
Home_team Home_team_score Away_team Away_team_score Venue Crowd Date_
Melbourne 18.16 (124) South Melbourne 10.13 (73) MCG 23000 26 July 1941
Collingwood 22.20 (152) Hawthorn 12.13 (85) Victoria Park 4000 26 July 1941
Carlton 12.11 (83) Richmond 11.18 (84) Princes Park 27000 26 July 1941
St Kilda 18.14 (122) Geelong 11.15 (81) Junction Oval 4000 26 July 1941
Footscray 15.20 (110) Fitzroy 9.4 (58) Western Oval 10000 26 July 1941
North Melbourne 12.14 (86) Essendon 17.8 (110) Arden Street Oval 10000 26 July 1941

Question: What is the average attendance in the 13th round of the 1941 VFL season when the home team is North Melbourne?

Question: What was the number of visitors in round 13 of the VFL season at mcg in 1941?