"Look at the following code. Which line will cause a compiler error? Line 1 public class ClassA
Line 2 {
Line 3 public ClassA() {}
Line 4 public final int method1(int a){ return a;}
Line 5 public double method2(int b){ return b;}
Line 6 }
Line 7 public ClassB extends ClassA
Line 8 { Line 9 public ClassB(){}
Line 10 public int method1(int b){ return b;}
Line 11 public double method2(double c){ return c;}
Line 12 }"

a. Line 4
b. Line 5
c. Line 10
d. Line 11

Write a program that will askthe user to enter the amount of a purchase. the program should thencompute the state and county sales tax. assume the state sales tax is4 percent and the county sales tax is 2 percent. the program should displaythe amount of the purchase, the state tax, the county sales tax, the total salestax, and the total of the sale. (which is the sum of theamount of purchase plus the total sales tax). hint: use the value 0.02 torepresent 2 percent, and 0.04 to represent 4 percent.