Add the apostrophes in the correct places. then choose the correct answer /, a or b​

1a. My mother’s new husband is my stepfather.

2a. My sister’s husband is my brother-in-law.

3b. My son’s wife is my daughter-in-law.

4b. My father’s wife’s daughter is my stepsister.

1)

2) consist the it' able to

3) provide the ?

даух слов не знаю, увы