Organic Chemistry Nomenclature Example

Question: 

Provide an acceptable bond-line structure for Trans-1-isopropyl-2-methylcyclopropane

methylcyclopropane organic chemistry nomenclature help

Comments

Why I cannot draw the isopropyl at the top of cycloprane? Also, How I could know when to draw a wedge or dashed line? I know that I wedge line comes toward the reader and that a dashed line goes away fro the reader, but I don't know when I should use each one. Could you help me?
By Mary