A Train Starts from Rest and Accelerates Uniformly Until It $42 \mathrm {~m} / \mathrm { s }$

Multiple Choice

A train starts from rest and accelerates uniformly until it has traveled 5.6 km and acquired a forward velocity of $42 \mathrm {~m} / \mathrm { s }$ The train then moves at a constant velocity of $42 \mathrm {~m} / \mathrm { s }$ for 420 s.The train then slows down uniformly at $$0.065 \mathrm {~m} / \mathrm { s } ^ { 2 }$$ until it is brought to a halt.The acceleration during the first 5.6 km of travel is closest to which of the following?

A) 0.16 m/ $\mathrm { s }^2$
B) 0.14 m/ $\mathrm { s }^2$
C) 0.17 m/ $\mathrm { s }^2$
D) 0.19 m/ $\mathrm { s }^2$
E) 0.20 m/ $\mathrm { s }^2$