2O-notation, -notation, and -notation O-notation characterizes an upper-bound on the asymptotic behavior of a function, while -notation characterizes a lower-bound, and -notation characterizes a tight-bound. 2.1 Ordering Functions Order the following functions so that for all i,j, if fi comes before fj in the order then fi=O(fj). Prove that your ordering is correct. f1(n)=3nf2(n)=12f3(n)=nf4(n)=n!f5(n)=n2+100nf6(n)=n+log(n)