Please clearly explain step by step and label what the names of the equations used are. thank you!

16.2 A bat emits an echolocating pulse of At = 2 ms duration with intensity / = 1x 10-2 W/m measured at r, = 1 cm from its mouth. The threshold of hearing of the bat at a frequency of 60 kHz is close to that for humans at 4 KHz, that is, In = 1 X 10-12 W/m?. What are the acoustical power and energy of the pulse? What is the maximum distance at which the bat can detect a bug with effective area A = 10 mm? What is the upper limit of the repetition rate of the echolocating system