i. Open the PheT "Wave Interference" lab by typing the following link into your web browser: bit.ly/2U2tQVw ii. Select the "Interference" option. 111. Select the "Slow" option. iv. Select the Sound wave option by clicking the speaker. V . Drag the pressure sensor above the grey window. vi. Don't adjust the variables (mid-level frequency, max amplitude, and separation 200 cm.) vii. Turn on each speaker by hitting the green buttons. vill. Play with the pressure sensor by moving a sensor around the window and observing the screen on the sensor. ix. In what areas (black, white or grey) is destructive interference occurring? How is destructive interference created in this scenario? (Use the words crest, trough, and wave.) Write these observations in your notes