please guide me how to solve this problem, include calculate the degree of freedom

Using 10 observations on each variable, a computer program generated the following multiple regression model: 3?: 63.6 1.69x1+ 9.01x2+ 5.43x34.01x4 3.59x5 If the standard errors of the coefficients of the independent variables are, respectively, 0.75, 5.67, 1.91, 1.43, and 2.23, can you conclude that the independent variable x2 is needed in the regression model? Let I31, [52, ..., B5 denote the coefficients of the 5 variables in this model, and use a two-sided hypothesis test and significance level of 0.10 to determine your answer. Carry your intermediate computations to at least three decimal places and round your answers as specified in the table. The null hypothesis: The alternative hypothesis: The type of test statistic: The value of the test statistic: (Round to at least two decimal places.) The two Critical values at the 0.10 level of signicance: (Round to at least two decimal places.) Can you conclude that the independent variable x2 is needed in the regression model