Suppose that annual earnings and alcohol consumption are determined by the SEM log(earnings) = 0 + 1

Suppose that annual earnings and alcohol consumption are determined by the SEM
log(earnings) = β0 + β1 alcohol + β2 educ + ux
alcohol - y0 + y1 log(earnings) + y2educ + y3 log(price) + u2,
where price is a local price index for alcohol, which includes state and local taxes. Assume that educ and price are exogenous. If β1, β2, y1, y2, and y3 are all different from zero, which equation is identified? How would you estimate that equation?