Based on 3d and 3e answer the question 3f.(Please attach the right answer because the previous tutor attached the wrong answer and provided me a link which I couldn't even open and I spent one of my questions for nothing! Thank you)

3d. Beat measurements. Units Set 1 Set 2 Set 3 Set 4 m 3.690 Max top beat Peak 3.250 3.120 3.298 m 1.550 1.850 Max bottom beat Peak 1.860 1.750 m 1.07 0.70 Beat Amplitude max, A beat max 0.63 0.774 Min top beat Peak m 2.810 2.550 2.610 2.775 Min bottom beat Peak m 2.185 2.390 2.370 2.201 Beat Amplitude min, A beat min m 0.313 0.08 0.12 0.287 Sec 0.0626 Start time 0.1047 0.3119 0.3920 Stop time Sec 2.7426 2.7890 2.5347 2.6194 # N periods 6 6 5 5 Beat Period Sec 0.447 0.447 0.445 0.445 2.237 2.247 Beat Frequency Hz 2.237 2.247 3e. Show mean period and frequency value calculations here: Mean of period: (0.447 + 0.447 + 0.445 + 0.445) / 4 = 0.446 Sec Mean of frequency: (2.237 + 2.237 + 2.247 + 2.247) / 4 = 2.242 Hz 3f. Why the measured beat minimum amplitude is not zero try to create empirical formulas for A beat max=f(Ac, Ac') and A beat min=f(Ac, Ac')