An investment company advertised that last year its clients, on average, made a profit of 9%. Assuming that average refers to the mean, which of the following claims must be true based on this information? Note: More than one statement could be true. If none of the statements is true, mark the appropriate box. Last year some of their clients made a profit of exactly 9% . Last year fewer than half of their clients made a profit of 9% or less. Last year all of their clients made a profit of more than 4%. Two years ago at least one of their clients made a profit of at least 9%. Last year at least one of their clients made a profit of 9% or more. None of the above statements are true.