Write the degree of each polynomial given below:

(i) xy + 7z

(ii) x² - 6x³ + 8

(iii) y - 6y² + 5y⁸

(iv) xyz - 3

(v) xy + yz² - zx³

(vi) x⁵y⁷ - 8x³y⁸ + 10x⁴y⁴z⁴

Write the coefficient of:

ab in 7abx

Write the coefficient of:

5x² in 5x² - 5x

Write the coefficient of:

8 in a² - 8ax + a