i. 20 °F 111. 2°F -50 °F iv. -65 °F Problem 2 1. Using Excel fit an appropriate equation to the voltage versus time data presented below. R must be at least 0.95 (Hint: Use an equation V which can be easily solved for t.) 2. Using Matlab fit the data using the type of equation found in Excel. (Do all the curvefitting process, do not copy and paste the equation from Excel). Time (sec) Voltage (V) Time (sec) Voltage (V) 0 9.8 6 0.6 1 5.9 7 0.4 2 3.9 8 0.3 3. 2.1 0.2 4 1 10 0.1 Using the resulting equation in part 1 and 2, answer the following questions both in Excel and Matlab. a. What voltage would you expect after 1.5 seconds? b. What voltage would you expect after 15 seconds? c. How long will it take for the voltage to decline to 1.5 volts? (Hint: Solve for t and use value of V d. How long will it take for the voltage to reach 0.17 volts? (Hint: Solve for t and use value of V 19