i just need understanding of these example questions please, it is homework THIS ISNT AN ACADEMIC INTEGRITY VIOLATION I NEED HELP WITH MY HOMEWORK OMG

KEY QUESTIONS Lesson 16 1. Investigation: What are the most common letters in the English language? a) Before you start, predict which five letters you believe are used most often in English. Remember, there are 26 letters in the English alphabet. [1 mark] b) Here is a reading to analyze: At Joseph's cafe, wait staff ask every fifth customer to answer a questionnaire about food quality and service. About 30 percent of the customers surveyed filled out the questionnaire. The majority of customers complain about poor service. Do the wait staff need more training or did the happy customers ignore the survey?You will not be counting all the letters in the paragraph; instead you will underline every fifth word. Record the letters in the following tally table. [6 marks] Letter Tally Frequency Letter Tally Frequency A N B O P Q S