$6.)[4$ points$]$ Suppose that the rate of water usage, in gallons$/$day$,$ is given by the function graphed below, where $x$ gives the time, in days, after Friday, November $1$st$.$

Give an approximation for the total amount of water used the first $10$ days in November by using a right sum with five rectangles $(n=5).$ Draw the rectangles in the graph below and give your answer to the nearest $0\mathrm{.}1$ using an appropriate unit.

Approximate Water used ~~