An individual's preferences for two goods, Good X and Good Y, are described by the utility function U(X, Y) = X^(0.5) * Y^(0.5). Calculate the marginal rate of substitution (MRS) at the consumption bundle where the individual has 4 units of Good X and 16 units of Good Y. After calculating the value, explain in one or two sentences what this specific value represents in terms of the individual's willingness to trade between the two goods.