HELP ASAP PLEASE i really need help! :( Please help me this is due at 8:45 please

The photoelectric effect is an electron coming out of a metal because of electromagnetic radiation  

One type of electromagnetic radiation is light  

Frequency (f): the number of waves / second

Can be formulated :

v=fast wave propagation ⇒ speed of light =3.10⁸ m/s

λ= Wavelength

The energy can be formulated as

 E = h x f

Where

E = energy of light, J

h = Planck's constant (6,626.10⁻³⁴ Js)

f = Frequency of electromagnetic waves, Hz

1. λ = 4.82 x 10⁻¹⁰ m

the frequency =:

2. The energy

3. λ = 4.32 x 10⁻⁷ m

the answer is either b or c

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .