Handwritten please

A jet engine produces a sound level of 150 decibels at a distance of 30 meters. If the sound follows spherical spreading (assuming it spreads uniformly in all directions), what would be the sound level (in decibels) at a distance of 150 meters from the jet engine? In this case the reference intensity of sound is 1.00x10-12 W/m2. 85 dB B 164 dB 90 dB D 136 dB