In a world of Modigliani and Miller (1958), there are two firms, A and B, where A is unlevered firm (which means raising funds only through equity) and B is levered (raising funds both through equity and debt). The value of firm A thus equals to the value of firm A's equity: VA = EA; where as the value of firm B equals to the value of its equity plus debt: VB = EB + DB. Consider a two-period world with dates 0 and 1. At date 1, the assets for both firms are worth X equally. The firm B has debt at face value of Dr. The interest rate is r. (Hint: based on these information, the value of debt for firm B at date 1 will be min{(1 + r) * DR.X}, and the value of equity for firm B will be max{X (1 + r)DB,0}. Notation min{M, N} denotes that comparing the value of Mand N, and returning the minimum value. For example, if M VA<>