A bird perched on a swing like the one below has a mass of 50.9 g, and the base of the swing has a mass of 145 g. The acceleration of gravity is 9.81 m/s^2. The swing and bird are originally at rest. Without flapping its wings, the bird jumps off the perch horizontally at 3.25 m/s to reach its food bowl. How high will the base of the swing rise above its original level? Disregard friction. Answer in units of m.