A)rez = (a=10) or (b>10) = (10=10) or (20>10) = True or True = True
б) rez = (a>5) and (b>5) and (a<20) and (b>30) =
(10>5)and(20>5)and(10<20)and(20>30) = True and True and True and False = False
в) rez = (not (a<15)) or (b>20) = (not(10<15)) or (20>20) =
not True or False = False or False = False