. A school conducts a 100 mark exam for its student and grades them as follows:
Grade:
Grade A: Marks>=90
Grade B: Marks>=80-89
Grade C: Marks>=70-79
Grade D: Marks>=60-69 AND FAIL THEM WHO HAS <60

Write a java program to calculate the grade for a student in a method passing
parameter for grade to display every grade type, using if..else statement.