The manager of a store is concerned about the wrong account numbers written on invoices by the store employees. Over a period of twelve weeks, 12 samples (one sample each week) of 60 invoices were (randomly) selected and the number of invoices having wrong account number was recorded. The results for the past 12 weeks are shown in the following table. Sample Invoices having wrong account mumber 6. 10 12 15 12 19 21 17 15 19 4. 10 For the p-chart (i.e., p control chart), what is the value of lower control limit? Please take up to five decimal points in your calculations. [Select the appropriate range in which your answer falls.) Less than or equal to 0.030 Greater than 0.030 but less than or equal to 0.050 Greater than 0.050 but less than or equal to 0.070 Greater than 0.070 but less than or equal to 0.090 Greater than 0.090 2014-intal