Table:
text: Tim Mayotte
Singles performance timeline
Singles performance timeline
Tournament _1978 _1979 _1980 _1982 _1983 _1984 _1985 _1986 _1987 _1988 _1989 _1990 _1991 _1992 Career_SR
Grand Slams Grand Slams Grand Slams Grand Slams Grand Slams Grand Slams Grand Slams Grand Slams Grand Slams Grand Slams Grand Slams Grand Slams Grand Slams Grand Slams Grand Slams Grand Slams
Australian Open A A 1R 3R SF 2R 4R NH A A A 1R A A 0 / 6
French Open A A A 1R 1R 1R A A A 2R 2R A A A 0 / 5
Wimbledon A A A SF QF 4R 4R QF 3R QF QF 1R 4R A 0 / 11

text: Tim Mayotte
Singles performance timeline
Singles performance timeline
Tournament _1978 _1979 _1980 _1982 _1983 _1984 _1985 _1986 _1987 _1988 _1989 _1990 _1991 _1992 Career_SR
U.S. Open A 1R 1R 2R 1R 4R 4R 1R 2R 3R QF 1R 1R A 0 / 13
Grand Slam SR 0 / 0 0 / 1 0 / 2 0 / 4 0 / 4 0 / 4 0 / 3 0 / 2 0 / 2 0 / 3 0 / 3 0 / 3 0 / 2 0 / 0 0 / 35
Year End Ranking 436 420 171 30 16 44 12 15 9 10 13 37 115 1097 N/A

Question: From Tim Mayotte's singles performance timeline list, what is 1986, when is 1978 "A", when is 1979 "A" and when is 1980 "1R"?