amy told her brother, I’M 14 INCHES TALLER THAN YOU,ROB.AND I’M 6 INCHES TALLER THAN YOU,TIM ROB IS 4 FEET…

amy told her brother, I’M 14 INCHES TALLER THAN YOU,ROB.AND I’M 6 INCHES TALLER THAN YOU,TIM ROB IS 4 FEET TALL.HOW TALL IS AMY?