Answer:
On the transfer of the building, 
Appreciation of building = FMV - Adjusted Basis
 = $50,000 - $10,000
 = $40,000
WFI has taxable transaction and gain recognition of $40,000. 
On the transfer of the land, 
Appreciation of land = FMV - Adjusted Basis
 = $150,000 - $90,000
 = $60,000
WFI has taxable transaction and gain recognition of $60,000.