What will happen if government put a tax only on red pencils

Question

Problem

Suppose that all consumers view red pencils and blue pencils as not substitutes. Suppose that the supply curve for red pencils is upward sloping. Let the price of red pencils and blue pencils be p_rand p_b. What will happen if the government put a tax only on red pencils?

The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.