Question 20An equiangular octagon has four sides of length $1$ and four sides of length $\dfrac{\sqrt{2}}{2},$ arranged so that no two consecutive sides have the same length. What is the area of the octagon?$\dfrac{7}{2}$$\dfrac{7\sqrt{2}}{2}$$\dfrac{5 + 4\sqrt{2}}{2}$$\dfrac{4 + 5\sqrt{2}}{2}$$7$