What is the magnetic field amplitude of an electromagnetic wave that has electric field amplitude $1500\text{V/m}$?

Which of the following statements is true about electromagnetic waves propagating in air?

You measure the electric field of an electromagnetic wave at a particular moment and find it points in the +z direction. The magnetic field points in the +y direction. In which direction is this wave traveling?

You measure the magnetic field strength of a traveling electromagnetic wave to be $8.0\(\times\)10^{-7}T$ , oriented along the +x direction. If this EM wave moves in the +y direction, what is the magnitude and direction of the wave's electric field at that same exact spot?