can anyone confirm the answer for following 2 ques

1. prob ques.. the one at beg.. saying joint prob of a and b is 5 percent.. and conditional prob of b on A being 0.5. prob of neither happening ..

i selected 85 % .. as A independent prob wld be 10% i.e. 0.5/ 0.05 and neither a and b= 1- 0.05-.10 = .85 ..

2. the total number of payments on tht ISDA confirmation stuff.. with qrtly floating payment and fixed payment.. options were 5, 14, 21 .. i selected 14 .. dunno if its right or wrng

can anyone pls confirm