need physics help

Three long wires each have a current of 15.0 A flowing out of the paper as shown in the figure below. (The current in each wire is shown by the dotted circle.) Each wire sits at one corner of a square that has sides of length 4.20 cm. P. 4.2 cm O tx 4.2 cm 1. What is the direction of the magnetic field at point P from the wire in the upper right corner 2. What is the magnitude of the magnetic field at point P from the wire in the upper right corner? 3. Answer questions (1), (2), and (3) for the wire in the bottom left corner. 4. Answer questions (1), (2), and (3) for the wire in the bottom right corner. 5. Now find the magnitude and direction of the total magnetic field at point P. 6. If a fourth wire with a length of 0.500 m were now placed at point P parallel with the other three wires with 15.0 A flowing in the opposite direction (into the page), what magnitude of force would the fourth wire feel? (Assume the other three wires are very long). 7. What direction would the force on the fourth wire be? 8. Now assume that the wire at point P is also attached to a nonconducting thread hanging from the ceiling at a 0= 450 angle as shown below. (a) Draw a free body diagram of all the forces acting on this wire. (b) Use Newton's second law to find the mass of the wire and the tension in the thread. Thread attached to ceiling Wire at point P