It is desired to accept lots that are 9.5% nonconforming with a probability of 0.10 and to accept lots that are 2.3% nonconforming with a probability of 0.95. Find a double sampling plan for a lot size of 2000 if the second sample is to be twice as large as the first sample and the consumer's stipulation is to be satisfied exactly. Find the average sample number for lots that are 2.3% nonconforming.