7. The maker of grandfather clocks needs to be very careful about the weight of the swinging pendulum, which is essential to the time-keeping precision. It is desirable to have 99.9% of the pendulums with a weight of 1.0000+ 0.0002 kilogram (total 20pts) (a) If the process is in a statistical control, centered, and has a normal distribution, what value of o x would be required to meet the criterion? (10pts) (b) If the process is centered, what values of Cp and Cpk would the value of o x found in part (a) produce? (10pts)