Step-by-step explanation:
a.
for tanya:
realized gain
= (89000+3000) - adjusted basis of 80000
= 92000 - 80000
= $12,000
recognized gain:
this is what she received = $3000
adjusted basis:
= realized gain - recognized gain
= 12000 - 3000
= $9,000
b. for martins;
realized gain
= 92000 - his adjusted basis
= 92000 - (72000 + 3000)
= 92000 - 75000
= $17000
adjusted basis
= $92000 - 17000
= $75,000
c. recognized gain for martin
amount sold - adjusted basis
= 120000 - 75000
= $45000