If you are 5.00 {rm m} away from a lightning strike of 5.00104 {rm A} (strikes of that magnitude do occur), what strength of magnetic field do you

If you are 5.00 {rm m} away from a lightning strike of 5.00×104 {rm A} (strikes of that magnitude do occur), what strength of magnetic field do you experience? Model the lightning as a long, straight wire.