Could anyone help on the below questions and provide steps and reasoning for that?

Let y, X1, X2 and X3 be 25 x 1 vectors. Suppose we regress y on X1, X2 and X3 and obtain estimates where V is an estimate of the variance matrix of n1/2(8 - B). Find the t-statistics based on B and V for testing the following null hypotheses. Enter whole numbers in all ten blank spaces. (a) The absolute value of the t-statistic for testing Ho : B1 = 0 is equal to 5 times divided by the square root of (b) The absolute value of the t-statistic for testing Ho : 382 = -6 is equal to 5 times divided by the square root of (c) The absolute value of the t-statistic for testing Ho : B2 = 2 - B1 is equal to 5 times divided by the square root of (d) The absolute value of the t-statistic for testing Ho : B1 = 482 is equal to 5 times divided by the square root of (e) The absolute value of the t-statistic for testing Ho : B1 + B2 + 83 = 1 is equal to 5 times divided by the square root of