How do I find the solution to this? what exactly do I do with the functions to figure it out?

Which of the following sets of functions constitute linear vector spaces with respect to the naturally dened addition and scaling? Explain. (a) Continuous unbounded functions (b Discontinuous odd functions ) (c) Linearfractional functions, i.e., functions of the form f (m) = ) (d The set of functions of the form f (m) = A cot(:v+c,o), where A and (,0 are arbitrary constants. (e) The set of functions of the form f (as) = 13(3) sin(201933)+q(x) cos(2019m), where 13(3) and (1(3) are polynomials