3. In a survey of 275 students, 32% of them admitted that they have texted while in class, (a) Find x, the number of students that have texted while in class. (b) Find the critical value Zay, for 98% confidence interval. Draw and Label. (c) Find the margin error for this confidence interval. (d) Find the 98% confidence interval for the proportion of all students that have texted while in class.4. Find the minimum sample size needed when estimating population propoion with 98% condence interval, margin of error to be within 5% and (3)13 = 0.768. (b) :6 is unknown