4. Consider the demand equation given by: Q1 = 120 20F. Total revenue byS when the price decreases from $5 to $4. {increases/decreases) This total effect can be decomposed into a price effect which caused total revenue to by (increase/decrease) $ and a quantity effect which caused total revenue to by S {increase/decrease) Provide a sketch that represents this graphically you do not need a detailed accurate graph rather, just a sketch (simple picture/graph) that shows me you understand what is being asked in this