Answer
5
Work Step by Step
When the terms are written in order, the polynomial can be written as:
$$-x^5+6x^2-3x+8$$
Thus, in order, we see that (a) the degree of each term is 5, 2, 1, 0; (b) the leading term is $-x^5$ with a coefficient of -1; and (c) the degree of the polynomial is 5.