Please solve with steps

Find the magnitude and the direction of the magnetic flux density B at the point P in the diagram below. The current / in the connected straight wires is a constant 70 A. The angle between each consecutive wire is 90. The length L of each straight wire is 3 cm and all the wires and the point P are in the same plane. P is midway between the two vertical wires and a distance L from the top wire. L L L L/2 P L/2 L I - >