[填空题]
106 runners at a marathon evebs (wi-. pe*ibvl, oj.no5l:ia .ne h 3 n:q.0ldtfntr tt4(zj:;kv t,mt were asked through which media channels they received imni jlo05;,(k::ttqtdf3l.tn4a zr he: .vntnformation about the marathon. The summary shows that 52 runners answered "TV advertising", 64 answered "social media" and 14 answered "others". Find the probability that a runner selected at random from the marathon received information about the marathon through:
1. both TV advertising and social media; ≈
2. only TV advertising. ≈
