This graphic depicts the prod_id column in four IMCUs. IMCU 1 contains values 1–7, and has a minimum of 1 and maximum of 7. IMCU 2 contains values 8–14, and has a minimum of 8 and a maximum of 14. IMCU contains values 15–21, and contains a minimum of 15 and a maximum of 21. IMCU 4 contains values 22–28, and contains a minimum of 22 and a maximum of 28.