A Bird Is Flying with Velocity $\vec { v } = 8 \vec { i } + 3 \vec { j }$

Essay

A bird is flying with velocity $\vec { v } = 8 \vec { i } + 3 \vec { j }$ (measured in m/ sec )relative to the air.The wind is blowing at a speed of 4 m/ sec parallel to the x-axis but opposing the bird's motion.Find the speed of the bird relative to the ground.