on 9 F3 ON REGULATED DC POWER SUPPLY Fe th Ray 1 Speaker l, Model:3010 (1 Chistos **** Ray 2 P TOLTS Straight Path Ray dr $13.1 13. (L-1) +\\ 12 YULTS-EA-18 11-1) + LL- Microphone Figure 11 1. Using the echo equation, write an expression that represents figure 11. 2. Using Simulink build a model for your expression derived in step 1. For the source use the block labeled "From multimedia File" located in the DSP Toolbox/Sources. For the sink use the block labeled "Audio Device Writer" located in the DSP Toolbox/Sinks. This will allow you to load a .wav file for the sound, and play the output to the computer speakers. Use a Delay block from DSP Toolbox/Signal Operations for signal delays, use SUM blocks, circles, for adding 3. Vary the values of attenuation and delays while observing the changes in the output. 4. Print and turn in your Simulink model and the equation from step 1. 0