Which of the following are true?

In the univariate regression, Omitted variables bias in the slope coefficient is positive if...

i) We have a small sample

ii) The omitted variable has no effect out the outcome but there is a positive correlation between the explanatory variable and omitted variable

iii) The slope coefficient estimate tends to be greater than the true slope coefficient

iv) The explanatory variable is positively correlated with the omitted variable and the omitted variable has a negative effect on the outcome.

v) We have insignificant coefficient estimates without the omitted variable

vi) The R^2 is close to 1

Vii) The omitted variable is uncorrelated with both the explanatory variable and the outcome

viii) The slope coefficient estimate tends to be lower than the true slope coefficient

viiii) The explanatory variable is positively correlated with the omitted variable and the omitted variable has a positive effect on the outcome.

x) The explanatory variable is negatively correlated with the omitted variable and the omitted variable has a negative effect on the outcome.