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 In Group C, when X = 7.0, the predicted value of Y equals ______