Can you slove this for me please thank you

Consider two speakers. One is located on the x-axis at x = +4 m and one on the y-axis at y = +4.3 m. Each speaker produces sound at a frequency of 700 Hz and at a sound level of 50 dB at the origin. When both speakers are on, sound intensity at the origin is measured to be 55 dB. (a) What is the power in W produced by each speaker? (b) What is the Original Phase Difference between the two speakers? Speed of sound for this problem is 350 m/s