9)Determine if f(x)=25x^5-2x^4+x^3-3x^2+x-11 is even,odd, or neither.

10)

a)Give an example of a polynomial with 4 terms that is odd

b)Give an example of a polynomial with 5 terms that is odd

c)Give an example of a polynomial with 4 terms that is even

d)Give an example of a polynomial with 5 terms that is even

13) Prove the identity cot(x)+ tan(x)=secxcscx

Please explain