This is $$all the information I was given... Due in$30$minutes$.$ I have received two answers for this. one being $-70$ and another being $-46\mathrm{.}53.$ Could someone confirm the correct answer?

Find an approximation to the net signed area in the earlier problem: $($solved; Area$=(20)/(3))$by using Left Riemann sum over the interval between the two x $-$intercepts$.$ Let the interval be divided into n $=7$x $5$x $10$equal parts. You will be using the summation formulas covered in this chapter. It is better to express the quadratic function in the general form g $($x$)=$ax$^(2)+$bx $+$c$.$

Extra information:

Function in general form is: g$($x$)=-5($x$-6)^(2)+5$

Range: $(-$infinty,$5)$X$-$intercepts: $(7,0)(5,0)$Vertex: $(6,5).$