The registrar at Eastern University studied the grade point average (GPA's) of its students. The GPA's are normallj.r distributed with a mean of 2.8 and a standard deviation of 0.4. (a) What percentage of students a have a GPA of 2.3 or lower? [4 marks] ANSWER (Percentage, 2 decimal places]: (1)) What percentage of students a have a GPA of 3.8 or higher? [4 marks] ANSWER (Percentage, 2 decimal places]: (c) Any student with a GPA in the top 1.5% of students will be awarded the dean's scholarship. What is the minimum GPA required to receive this scholarship? [4 marks]