Who among the following is a user innovator?

Jessica, an ace designer for a clothing brand, has been asked to work on a dyeing technique that changes fabric color according to the room temperature.

Ivan, a scientist at a reputed pharmaceutical company, has developed an anti$-$inflammatory drug for the company to commercialize.

Sandra, an engineer, has developed a device that helps track the location of her teenage daughter's car.

Samuel has invented a detachable bicycle, which he plans to sell to a reputed bicycle manufacturing firm in order to make profits.