Please I just need help with the Part A of the. lab. Complete the required things listed below.

You only need a ruler, phone and phyphox app. That's it

Lab-Link Part A: https://drive.google.com/file/d/1JmTr36Dt6QfQRK1-EO_8aMk1Ed3hzpJ1/view?usp=sharing

Part A: Echolocation

• Submit the two screenshots from Phyphox showing your audio spectrum (i) the full graph, and (ii) zoomed in on the echolocation peak, with the Pick tool selecting the peak value.
• Include measured values,d_eandd_t, for the distance between the phone and the reflecting surface, as well as thepercent difference.
• Question: Why do you think the best results are obtained with the phone 0.5 - 1 m from the reflecting surface?
• Question: How precisely could you measure changes in the position of an object using the Phyphox echolocation app? Explain how you arrived at your answer.