a A biased die with four faces is used in a game. A player pays 5 counters to roll the die. The table below shows the possible scores on the die, the probability of each score, and the number of counters the player receives in return for each score. Probability 1 l 1 1 5 E E E Number of counters player receives Find the value of n so that the player gets an expected prot of 3.25 counters per roll. [5 marks]