A student is performing an experiment of tossing a coin repeatedly.
a. (i) Explain the difference between a trial and an event in the context of this experiment.
b. (ii) After 200 tosses, the student has obtained 104 heads. Another student claims that tossing the coin 20 more times, regardless of outcomes, cannot reduce the empirical probability of heads below 0.50. Is this claim correct? Justify your answer with suitable calculations and reasoning.