please help answer these standing wave questions -physics

If the length of this string is L= 4meters then the wavelength of this standing wave is O a. 8m Ob. 1/2m O c. 2m O d. 1/8m O e. 4mIf the speed of this wave is 2 m/s, then knowing the wavelength (from L=4m)of this harmonic you can calculate the corresponding frequency of the harmonic as O a. 1/2 hz 0c. 2112 0 d. 1hz 0 e. 1/4 hz The frequency of this standing wave is 15Hz and the length of the string is 6m. What will be the frequency of the fundamental? O a. 15Hz O b. 45 Hz O c. 10 hz O d. 30 HzThe frequency of this standing wave is 15H: and the length of the string is fun]. Knowing the wavelength you can calculate the speed to be O a. 45 m/s 0 b. Sony's O c. 40 m/s 0 d. 30 1111's 0 e. 0.3 m/s The frequency of this standing wave is 15Hz and the length of the string is 6m. What is the wavelength of this harmonic? O a. 6m Ob. 1,1'2m 0 c. 10111 0 d. 1,14111 A guitar string is tightened. This increases the tension in the string and therefore increases the speed of the wave on the string. Select one: 0 True 0 False