3. Given that x=1,y=5,z=3, evaluate the following Boolean expressions: a. x=2 b. y%z==0 or x>=1 c. y//z==1 and x+z1 and x+4=zy) or z=y2 g. x>1 and (x+4=zy or z=z2) 4. Write a program that will prompt the user to enter raw score on a test and assign value to a variable score. Using the grading schedule below, display the user's letter grade. Grade F : if score less than 40 Grade D: if score between 40 and 59 inclusive Grade C: if score between 60 and 74 inclusive Grade B: if score between 75 and 89 include Grade A: if score greater than or equal to 90 5. Write a program the will prompt the user to enter a letter grade for a test, assign the value to a variable grade. Using the grade, convert to point grade using the conditions as shown below. Display the user's point grade. Point 4: if letter grade of A Point 3 : if letter grade of B Point 2: if letter grade of C Point 1 : if letter grade of D Point 0 : if letter grade of F 6. Write a program the will prompt user to enter credits and point grade of three courses. Assign values to variables credits1, grade1, credits2, grade2, credit3, grade3. The program should calculate the gpa using gpa = (credits1"grade 1+ credits2*grade 2+ credits 3 grade3) / (ccredits 1+ credit 2+ credits 3 ) The program should display the gpa in 2 decimal places and also display the ranking using the following: Excellent: if gpa is 3.5 and above Very Good: if gpa is greater than or equal to 2.75 and less than 3.5 Good: if gpa is greater than or equal to 2.0 and less than 2.75 Poor: if gpa is less than 2.0