Need help with practice problem

An electromagnetic wave has a frequency of 100 MHz and is traveling in a vacuum. The magnetic field is given by3[z,t) =(i.ticx10'\" W]sin(rcz+mt)f. T533 a. Find the wave number (k), the angular frequency (w), and the direction of propagation of this wave. b. Find the electric eld vector E(z,i} (with direction). c. Find the average energy density of the electromagnetic wave d. Find the intensity of the electromagnetic wave. (BJTI'LT : i and E = i) J3 mm 5