015 (part 1 of 3) 10.0 points A magnetic field directed into the page. changes with time according to B=a+bt2, where a = 1.88 T, b = 0.03 T/s, and t is in seconds. The magnetic field is confined to a region that has a circular cross section of radius R 2.3 cm. *P x xxx xxxx xx xxx x x P 12 X R x x Bi What is the magnitude of the electric field at point P when t = 2.7 s and r = 1.74 cm? Answer in units of mV/m. 016 (part 2 of 3) 10.0 points What is the direction of the electric field? 1. The electric field is parallel to r and directed away from the center of the magnetic field. 2. Information is not sufficient to make a decision. 3. The electric field is perpendicular to ri and directed clockwise. 4. The electric field is parallel to r and directed to the center of the magnetic field. 5. The electric field is perpendicular to ri and directed counter-clockwise. 017 (part 3 of 3) 10.0 points What is the magnitude of the electric field at point P when t = 2.7 s and r2 = 2.86 cm? Answer in units of mV/m.