Electromagnetic Wave questions

Hi, could someone please answer these questions?

1. An electromagnetic wave has a frequency of 4.33 x 10^12 Hz. What is the wavelength of this wave?
a) 1.3 x 10^21m
b) 1.44 x 10^5m
c) 2.97 x 10^-8m
d) 6.93 x 10^-5m
e) 8.71 x 10^-6m

2. An electromagnetic wave with a wavelength of 0.728 m would have a frequency of:
a) 1.37 Hz
b) 4.59 x 10^-9 Hz
c) 2.43 x 10^-9 Hz
d) 2.18 x 10^8 Hz
e) 4.12 x 10^8 Hz

3. Which of the following statements is true? (It's PHOTON, not PROTON)
a) Photon carry more energy than an electron was able to absorb.
b) Photons carry exactly the same energy that an electron was able to absorb.
c) Photons carry less energy than an electron was able to absorb.

Thanks in advance!! :D

1) wavelength lambda = C / f = 3x10^8 / 4.33 x10^12 = 0.6928 x10^-4 m = 6928 angstroms, th answer is (d)

2) frequency f = C / lambda = 3x10^8 / 0.728 = 4.12 x10^8 Hz., the answer is (e)

3) (a)