I don't get this,...

Use upper&lower sums to approx. the area of the region using the indicated number of subintervals(of equal length)

$\displaystyle y = 1/x$

It starts at 1 and ends at 2.. There are 5 squares..

What am I suppose to do?? Submation? I ended up getting lost.. Before I started it I got 1/(5+i) and had no idea how to use the submation.. Help!!