Please help solve both questions highlighted yellow. I dont believe the answer highlighted gray for each answer is correct. Thank you

12) A 30 cm long organ pipe is filled with air and is open at one end and closed at the other. The speed of sound in air at 0 C is 331 m/s. What is the wavelength of the fundamental mode? 1.6 m 13) The sound of a band is rated as 50 dB at a distance of 30.0 m. What is the sound intensity level of the band when one is 10.0 m from the band? 59.5 dB