Part A gure 1) is de sing at the rate 0.40 T/s. What is the magnitude of the acceleration of a proton at rest at point a? Express your answer with the appropriate units. View Available Hint(s) HA FOE ? an = Value Units Submit Part B What is the direction of the acceleration of a proton at rest at point a ? > View Available Hint(s) horizontally to the right downward upward horizontally to the left Oa=0 Submit Part C What is the magnitude of the acceleration of a proton at rest at point b? Express your answer with the appropriate units. View Available Hint(s) ab = Value Units Submit Part D What is the direction of the acceleration of a proton at rest at point b? * View Available Hint(s) O horizontally to the left horizontally to the right downward upward O a=0