A researcher conducted a taste test with four types of mangoes (Julian, East Indian, Number 11, and Robin). Each individual was blindfolded and given the samples to taste in random order with washout periods between them. 1. How many sequences are required for this study? 2. Give an example of the random sequences for two test subjects. 3. Give one example of a first order effect.  4. Give one example of a higher order effect. 5. How do I reduce order effects in this experiment?

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A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…