Suppose we have a data set with quantitative variables X and Y, as well as a categorical variable Group (Group A, Group B, and Group C). We use the R command lm(log(Y) ~ X + Group), and are given the coefficients table below. Variable Estimate of coefficient (intercept) 2 X 0.6 Group B 0.5 Group C -0.3 After controlling for Group, whenever X increases 1 unit, the predicted value of Y increases ______ %