Ahhhhhhhhh, that makes sense! Righton so the no. of function values will always be b on the squiggly line thingy.
Right, i think its all down pact, just one more q.
For [y0 +2(y1+y2+...+Yn-1) + yn)
yo=the first sub interval
then the ones in the brackets are say to till 5 ( for the 6...