Which of the following is true of recording a mortgage?

		A failure to record the first mortgage would remove the obligation of the mortgagor to the first mortgagee.
		The second mortgagee must know about the first mortgage and is exempted to record the mortgage.
		If the mortgage is not recorded and a later mortgage is given on the same property, the old mortgage is superior to the second.
		Recording a mortgage notifies any third party that the mortgagee has an interest in the real property covered by the mortgage.