In BDL, the equal sign is also the comparison operator. (Yes, this is based on an actual programming language!) A comparison is surrounded by parentheses. For example, in the statement i = (j = k) the value of i is set to either true or false depending on whether j is equal or not equal to k. Modify the grammar from the previous question to support the comparison operator. HINT: You can add or remove rules. Look carefully at line 7.

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.