A railway embankment 400 m long is 12 m wide at the formation level. The side slope of the embankment is 2:1. The formation level at zero chainage is 107.00. The embankment has a rising gradient of 1 in 100. The ground is level across the c/l. Calculate the volume of earthwork using the prismoidal rule with the following observations:<image 1>
['14563 $m^{3}$', '14583 $m^{3}$', '14553 $m^{3}$', '14573 $m^{3}$']