Write three-dimensional formulas and designate a plane of symmetry for all of the achiral molecules in Practice

Question:

Write three-dimensional formulas and designate a plane of symmetry for all of the achiral molecules in Practice Problem 5.4. (In order to be able to designate a plane of symmetry you may need to write the molecule in an appropriate conformation.)
In problem 5.4
(a) 2-Fluoropropane
(b) 2-Methylbutane
(e) trans-2-Butene
(g) 3-Methylpentane
(i) 2-Methyl-2-pentene