Salma wants to find the average height of students in the 12th grade at West High School. So she will use the heights of 44 students in the 12th grade to find the average height.Answer the questions below.(a) Which unit(s) could be used for the unit of measurement? Check all that apply.pounds ounces centimeters grams inches(b) Which of the procedures below would be the best way to find the average height?Measure the heights of 44 volunteers from the 12th grade.Ask for 44 volunteers from the 12th grade to state their own heights.Randomly pick 44 students from the 12th grade and have them state their own heights.Randomly pick 44 students from the 12th grade and measure their heights.