A company is going to introduce a new cell phone. ABC Cell Services is going to sell the phones and has established lower and upper specification limits of 5.0 ounces and 5.5 ounces respectively for the weight of the phone. The company currently has determined that its phones currently weigh 5.3 ounces.

b) If the company wants to have a C_pk of 1.5, what is the maximum value of the standard deviation (σ) so that the C_pk of the process indicates that the company can provide a process capability of at least 1.5?