DSE 2016 Question 12: Linear regression and OLS

The OLS regression of infant birth weight (BWT) on the mother's age (AGE) and years of mother's education (EDU) is: $\hat{BWT}=2600+2.3\,AGE+26\,EDU$, with standard errors $(97)$, $(3.5)$, $(8)$ below the estimated coefficients. Sample size is $1000$ and R-squared is $0.015$. Sample information: BWT mean $3000$, sd $500$; AGE mean $25$, sd $5$; EDU mean $10$, sd $2$. A one standard deviation change in AGE is associated with an $x$ standard deviation change in birth weight, where $x$ is