Task 2: /12 A grade 11 student completed a lab activity to find the speed of sound in air using a closed-air column (closed at one end). The temperature of the room was measured to be 21 C. Using a tuning fork with a frequency of 1040 Hz, the following information was obtained about resonant lengths for the closed air column: Observations: L1 = 7.4 cm L2 = 22.5 cm L3 = 36.7 cm Questions: a) Draw each of the columns and label the nodes and antinodes. b) Use the resonant lengths to do three calculations to find the wavelength. Find the average wavelength and use that in further calculations. c) Using the wave equation, what is the speed of sound in the air column? d) What is the theoretical speed of sound in the room according to the temperature? e) Why do you think the numbers are different? f) What type of wave is this transverse or longitudinal? Why