A quadrilateral has its vertices A, B, C, and D along the perimeter of a circle whose radius is 12 cm. Angle BAD = (8x + 12)" Angle ABC = (15y + 3) Angle BCD = 10y" Angle CDA = 7x' Find the value of angle ABC. Select one: O a. 82 deg O b. 68 deg O c. 75 deg O d. 94 deg

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