Please help me with part b of this question

Consider the following simple short-run AS/AD model of an open economy: = a-b(R -F), 620, (1) -F = TO (It - W ) , (2 Re (3a) (3b) where Y, is domestic short-run output, R, the domestic real interest rate, F the do- mestic marginal product of capital, R the domestic real interbank (overnight) rate of interest, *; the domestic inflation rate, 7 the domestic inflation target, and q a domestic risk premium. The superscript w refers to foreign variables. Normally, the risk premium equals zero but occasionally it may be positive. Assume the private sector has adaptive expectations. a) Briefly interpret the four equations. (5 points) b) Derive the AD curve associated with equations (1)-(3b). Briefly explain the intuition behind this AD curve. (4 points)Consider the following simple short-run AS/AD model of an open economy: = a-b(R -F), 620, (1) -F = TO (It - W ) , (2 Re (3a) (3b) where Y, is domestic short-run output, R, the domestic real interest rate, F the do- mestic marginal product of capital, R the domestic real interbank (overnight) rate of interest, *; the domestic inflation rate, 7 the domestic inflation target, and q a domestic risk premium. The superscript w refers to foreign variables. Normally, the risk premium equals zero but occasionally it may be positive. Assume the private sector has adaptive expectations. a) Briefly interpret the four equations. (5 points) b) Derive the AD curve associated with equations (1)-(3b). Briefly explain the intuition behind this AD curve. (4 points)