Mainly part D i can do part c correct but no idea how to tackle part d -_____-

c)

$\displaystyle \int^4_2{e^{2x}+3}=\frac{e^{2x}}{2}+3x$

then subbing 2 and 4 gives

$\displaystyle [\frac{e^{8}}{2}+12]-[\frac{e^{4}}{2}+6]=\frac{1}{2}[e^{8}-e^{4}]+6$

d) would it be like subbing in 2 and 4 into the equation getting the co-ordinates

$\displaystyle (2,e^{4}+3) and (4,e^{8}+3)$