Find the sum of f(x) and g(x) if f(x) = 5x^4 + 2x^3 + 3x^2 + 1 and g(x) = 7x^3+ 4x^2+ 3
a. Is f(x) a polynomial? If not, give an explanation.
b. Is g(x) a polynomial? If not, give an explanation.
c. Is the sun a polynomial? If not, give an explanation.
d. If the sum is a polynomial, identify the leading term.

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