Answer
See explanation.
Work Step by Step
The speed and the wavelength of the light will be affected by the fluid, but not the frequency.
a. $\lambda_0=\frac{3.00\times10^8m/s }{5.80\times10^{14}Hz}=5.17\times10^{-7}m $.
b. The wavelength is reduced by a factor of n.
$$\lambda=\frac{517nm}{1.52}=340nm$$
