Table:
text: 2011 Isle of Man TT
Practice Times  &  Leaderboard Supersport
Practice Times  &  Leaderboard Supersport
Rank_ Rider Mon_30_May Tues_31_May Wed_1_June Thurs_2_June Fri_3_June
1 Michael Dunlop 600cc Yamaha —— No Time 18` 02.60 125.462mph —— No Time Cancelled No Time 18` 04.32 125.266mph
2 Cameron Donald 600cc Honda —— No Time 17` 40.42 128.089mph 18` 05.67 125.110mph Cancelled No Time —— No Time
3 Bruce Anstey 599cc Honda —— No Time 18` 55.91 124.236mph 18` 43.04 120.947mph Cancelled No Time —— No Time
4 William Dunlop 600cc Honda —— No Time —— No Time 18` 15.75 123.959mph Cancelled No Time —— No Time
5 John McGuinness 599cc Honda —— No Time 18` 54.35 119.741mph 18` 47.02 120.519mph Cancelled No Time 18` 19.68 123.516mph

Question: How many riders had a time of 18' 55.91 124.236 mph of Isle of Man TT Practice Times & Leaderboard Supersport 2011 on Tuesday 31st May?

Question: Who was the rider with a practice time from Friday 3rd June and a leaderboard Supersport time of 18' 19.68 123.516mph at the 2011 Isle of Man TT?