A mother-child health survey asks young mothers about feeding habits. One of the questions asks: Q1: When feeding your baby, how often do you do any of the following things? u Putting your baby to sleep with a bottle of milk: The response options are: Always Often Occasionally Rarely Never Below, you see a frequency table, which is based on the responses the twenty mothers who responded to the survey. Frequency Table: Sleep with Milk Frequency Valid Percentage "Always" 8 40% "Often" 4 20% "Occasionally" 1 5% "Rarely" 3 ??? "Never" 4 20% Total 20 100% QUESTION: What is the valid percentage for the response option "rarely" for this frequency table? 5% 10% 15% 20%