: $$\tilde{V_{out}} - 0V = (\tilde{I_{0}})(Z_{R0})$$ $$\tilde{I_{0}} + \tilde{I_{0}} - \tilde{I_{0}} - \tilde{I_{0}} = 0$$ $$\tilde{V_{out}} - \tilde{V_{m}} = (\tilde{I_{0}})(Z_{C0})$$ $$\tilde{V_{m}} - \tilde{V_{in}} = (\tilde{I_{0}})(Z_{R0})$$ $$\tilde{V_{m}} = (\tilde{I_{0}})(Z_{R0})$$ $$0V - \tilde{V_{m}} = (\tilde{I_{0}})(Z_{C0})$$  T