Answer:
To get a function of degree 5, either functions of degree 1 and 4 or functions of degree 2 and 3 should be multiplied.
This function will have a total of 5 zeros, same as its degree.
The function of degree 5 will have at least one and up to five real zeros
The rest of the zero's are imaginary.
So if has 2 real zeros, then the remaining 3 will be imaginary.
Maximum number of imaginary zero's is 4.
