The length of a rectangular field is \(\left(\frac{2a+2\sqrt{5}}{4}\right)\) m and breadth is \(\left(\frac{a-\sqrt{5}}{2}\right)\) m. Find the area of the rectangular field.
\(\left(\frac{a^2-5}{2}\right)\) m²
\(\left(\frac{a^2-5}{4}\right)\) m²
\(\left(\frac{a^2+5}{2}\right)\) m²
\(\left(\frac{a^2+5}{4}\right)\) m²