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Find the area of the plane region $R$ in figure below by setting up a correct iterated integral:

$$R=\{(x,y): g(y)\leq x\leq h(y), c\leq y\leq d.\}$$

$\int_c^d \int_{g(y)}^{h(y)} 1dxdy$

$\int_c^d \int_{h(y)}^{g(y)} 1dxdy$

$\int_c^d \int_{g(y)}^{h(y)} 1dydx$

$\int_{g(y)}^{h(y)} \int_c^d 1dydx$

$\int_{h(y)}^{g(y)} \int_c^d 1dxdy$