please give me the answers in 30 minutes!!

of the binary code 4. Prove, using the truth tables of the disjunction, the validity of the logical expression A +A= 1 (rule of the excluded third). Prove the equivalence of logical expressions (*) and using de Morgan's rule. 5. Write a program in the Java programming language to evaluate the arithmetic expression z = X2, where the result is a double precision real number and x= 13.7. BE