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Question 4 1 pts Ê, where o is the charge per unit area The electric field due to an infintely large, charged plane is uniform in magnitude and direction and can be written E = ("surface charge density") and Ê is always the same direction, perpendicular to the plane. Consider a uniformly charged disk with a radius of 20 cm. If the electric field vector at point Plocated a small distance above the disk's center has a magnitude of 626 N/C, what is the disk's approximate charge? Give your answer in units of pC. Question 5 1 pts This question checks that you can use the formula of the electric field due to a long, thin wire with charge on it. The field due to an infinitely long, thin wire with linear charge density is Ē = arte, a f. Imagine a long, thin wire with a constant charge per unit length of -6.7x10-7 C/m. What is the magnitude of the electric field at a point 10 cm from the wire (assuming that the point is much closer to the wire's nearest point than to either of its ends)? Give your answer in units of kN/C.