The following three questions relate to the information here: Ripples radiate out from vibrating source in water. After

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The following three questions relate to the information here:
Ripples radiate out from vibrating source in water. After 6.00 s,
42 ripples have been generated with the first ripple covering a
distance of 3.00 m from the source (each ripple constitutes a
wave).
10. What is the wavelength of the ripples? (a) 0.048 m (b) 0.071
m (c) 0.43 m (d) 3.0 m
11. What is the frequency of the ripples? (a) 14 Hz (b) 7.0 Hz
(c) 0.33 Hz (d) 0.17 Hz
12. What is the speed of the ripples? (a) 0.1 m s−1 (b) 0.2 m
s−1 (c) 0.4 m s−1 (d) 0.5 m s