Part 1. Since you are now familiarized with the basic knowledge in determining the degree of a polynomial and how to evaluate polynomial expressions, it now your turn to prove what you have learned. For each of the given polynomial, determine the number of terms and evaluate given that a = -1, b = 2, x = -2 and y = 3. Show your solution. 1. 2(xy - 2)2 +5x2y 2. 6a3 + 463(b - 20) - 5 3. = ab - 262 + 363 4ab2 4. 1 $ 63 2 5. 11x3 - 5xy + 3y4 -7