CSU Inc. is selling a fancy popcorn maker. The machine is made in Vietnam and then shipped to the USA. It goes through the following steps with average completion times and standard deviations: Production Average: 8 Days St. Dev: 2.6 days Shipping to Port Average: 5 Days St. Dev: 1.2 days Shipping to USA Average: 28 Days St. Dev: 6 days Shipping to Distribution Center Average: 2 Days St. Dev: 1.3 days Shipping to Store Average: 3 Days St. Dev: 1.2 days Calculate the overall standard deviation of the process. 2.46 O 7.46 7.23 12.3 6.88 5.76