2.2. Show that almost surely n1 j=0 (Wj)40 as the time step tj=h0 for a fixed final...

2.2. Show that almost surely

n−1 j=0 (ΔWj)4→0 as the time step Δtj=h→0 for a fixed final time T = nh. HINT: Use thatE[|Z|4] = 3 for random variates Z ∼ N(0,1) .