Find the degrees of the following polynomials:
 
(i) \(2x^5 - 5x + 3\)  \(=\)  
 
(ii) \(y^6 + 2y - 1\)  \(=\)  
 
(iii) \(-4\)  \(=\)  
 
(iv) \(4z - 3\)  \(=\)