Evaluate the iterated integral.

${\displaystyle \underset{0}{\overset{2}{}}}{\displaystyle \underset{0}{\overset{7}{}}}{\displaystyle \underset{0}{\overset{4y}{}}}sinydzdxdy$

Step $1$

We are asked to evaluate the iterated integral ${\displaystyle \underset{0}{\overset{\frac{}{2}}{}}}{\displaystyle \underset{0}{\overset{\frac{}{7}}{}}}{\displaystyle \underset{0}{\overset{\frac{4}{y}}{}}}sinydzdxdy.$

For the first integration, hold $x$ and $y$ constant and integrate with respect to $$