According to the regression output below (Regression B), which of the following is true?

Regression B

SUMMARY OUTPUT Regression Statistics Multiple R 0.782428322 R Square 0.612194079 Adjusted R Square 0.526014985 Standard Error 6.545089085 Observations 12 ANOVA of SS MS F Significance F Regression 2 608.6229465 304.3115 7.103742 0.014085263 Residual 9 385.5437202 42.83819 Total 11 994.1666667 Coefficients Standard Error t Stot P-value Lower 95% Upper 95% Intercept 60.04141543 8.513934071 7.052135 5.97E-05 40.78155849 79.30127237 x1 -5.393266301 1.572370955 A 0.007508 -8.95021652 -1.836316083 x2 0.030803893 B 1.582832 0.147919 -0.01322051 0.074828297