need help with question no 21 ?

20. The funttion f(z)- (lgn) +2n4n+log n50 belongs in which of the (a) ?(ign) . (e) ?(n(Ign)2) (b) 6((logn)2) -,- ,(f) None of these (e) e(n) (d) ?(nign) 21. The function (x)n2n belongs in which of the following complexity categories: (a) 0(n) (b) ?(?) (e) e(ns) (e) 0(n4) (f) None of these (d) e(n lgn)