Yesterday I said in one of my posts that if Bangladesh can take 5 wickets on the fourth day then Bangladesh will win going to the fifth day.  I said 5 wickets but Bangladesh took 7 wickets, it probably won't be too late to take the remaining three wickets for Bangladesh on the fifth day because it is difficult for the batsmen to bat on the wicket on the fifth day and then again there is only one professional batsman on the wicket. Even if Daryl Mitchell is not out, this wicket will not be so easy for those batting at the other site. 
Taijul Islam truns the ball around 4 degrees and 5 degrees, if the ball truns so much then it is very difficult for the batsmen to bat on such wickets.