9.4 Calculate a sequential sampling plan that will allow you to classify a virus disease attack on small spruce plantations into three classes: <10%

9.4 Calculate a sequential sampling plan that will allow you to classify a virus disease attack on small spruce plantations into three classes: 30% attacked. Assume that it is very expensive to classify stands as >30% attacked if in fact they are less than this value. (a) Calculate the expected sample size curves for each of the sequential lines. (b) How large a sample would give you the same level of precision if you used a fixed-sample-size approach?