Considering the Galois fields used in AES with irreducible polynomial of P(x) = x + x + x + x + 1, answer the following: A. Find the sum of 5416 and 2816 in GF(2) expressed as a hexadecimal. B. Find the plain polynomial product (i.e., the result of multiplication) of 2516 and 2816 in GF(28) expressed as a hexadecimal. C. Determine the multiplicative inverse of 1516. D. Determine the AES S-box substitution value for BC 16. Provide just the answer.