We obtain the following demand curve of beef in a market with 25 observations: Q with hat on top equals 654.121 - 3.144 P, where Q is quantity demanded of beef measured in pounds, P is price measured in dollars per pound. The standard error of the slope coefficient is 1.521. We want to test the null hypothesis beta subscript 2 equals negative 4 versus the alternative it is not. What is the t-value you calculate for the test