Mr. Ito, an unmarried individual, made a gift of real estate to his son. Assume the taxable year is 2021 Required: a. Compute the amount subject to federal gift tax when the FMV of the real estate was $4.75 million, and the transfer was Mr. Ito's first taxable gift. b. Compute the amount subject to federal gift tax when the FMV of the real estate was $15 million, and the transfer was Mr. Ito's first taxable gift. c. Compute the amount subject to federal gift tax when the FMV of the real estate was $15 million. Two years ago, Mr. Ito made his first taxable gift: marketable securities with a $3 million FMV in excess of the annual exclusion