A natural dye for red hair uses \(400 mL\) of water, \(75 mL\) of marigold petals, and \(25 mL\) of hibiscus petals. a) What is the ratio in lowest terms? The ratio of \(400 mL\) of water, \(75 mL\) of marigold petals, and \(25 mL\) is \(16 : 3 : 1\)

b) A colourist uses \(40 mL\) of hibiscus petals to make the red dye. How many milliliters of marigold petals will she use? (A-5 marks)