A Physic Question

1. There is an ambulance coming from east with speed 44 m/s. I am in a taxi with speed 17 m/s from west. The taxi and the ambulance get closer to each other. Wind blows to my taxi with speed 12 m/s. If sound speed at the time is 300 m/s, and the frequency of the ambulance's siren is 200 Hz, find the frequency I hear!