Brainlist to whoever gets this right

At $1.32 million, they closed last month percent above what they paid in 2007." how much did they pay in 2007?

Me n o w. i need t h i s. 10 points

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6