Answer:
Degree = 2
Step-by-step explanation:
Given: 
We are given a polynomial with variable y.
Polynomial: It is an expression with positive number exponent of same variable.
Degree: It is highest power of variable.
In the given polynomial,
.
It has three term with variable y.
The highest power of y is 2.
Leading coefficient is 5
Hence, The degree of given polynomial is 2