Determine the magnitude of the magnetic flux through the south-facing window of a house in british columbia, where earth's b⃗ field has a magnitude of 5.8×10−5t and the direction of b⃗ field is 72∘ below horizontal with the horizontal component of b⃗ field directed to the north. assume the area of the window is 4.0 m2. express your answer in tesla meter squared.