A circle is shown. 2 chords intersect to form 4 angles. From top left, clockwise, the angles are: 3, 2, 1, 4. Angle 3 intersects an arc with measure 54 degrees. Angle 1 intersects an arc with measure 112 degrees.
Marcel is designing a circular necklace that will consist of 4 sections, each with a different color of plastic. Determine how he needs to cut the plastic by finding the measures of the angles.

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?