Using the grammar for real-number constants discussed in class, write a set of rewrite rules for signed real-number constants that allow an optional sign at the front of the constants. Use signed-real-const as the new start symbol. You can reuse as much or as little of the real-number constant grammar rules as you deem appropriate. Examples of valid signed real-number constants are:

Write a program that defines symbolic names for several string literals (chars between quotes). * use each symbolic name in a variable definition. * use of symbolic to compose the assembly code instruction set can perform vara = (vara - varb) + (varc - vard); ensure that variable is in unsigned integer data type. * you should also further enhance your symbolic logic block to to perform expression by introducing addition substitution rule. vara = (vara+varb) - (varc+vard). required: debug the disassembly code and note down the address and memory information.