An investment company advertised that last year its clients, on average, made a profit of 7%. 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 all of their clients made a profit of less than 9%.

Last year fewer than half of their clients made a profit of 7% or less.

This year some of their clients will make a profit of at least 7% .

Last year at least one of their clients made a profit of 7% or more.

Last year at least one of their clients made a profit of exactly 7%.

None of the above statements are true.