A rod has length 2 meters.
At a distance x meters from its left end, the density of the
rod is given by
\delta(x)=2 + 6 x g/m.

**(a)**
Complete the Riemann sum for the total mass of the rod (use

mass =

**(b)**
Convert the Riemann sum to an integral and find the exact mass.

mass =

(include units)

You can earn partial credit on this problem.