i) The parameters associated with the variables WIN and FREE are both expected to be positive Test these expectations individually by conducting an appropriate pair of ttests using a 5 significance level in each case ii) The parameter associated with the variable WEEK is expected to be negative Test this expectation by conducting an appropriate ttest using a 1 significance level iii) The sign of the parameter associated with the variable DAY is uncertain Test the significance of this parameter by conducting an appropriate ttest using a 5 significance level