Sunflower oil are produced by mechanically pressing sunflower seeds to extract the oil. A feed of 10,000 kg/h of sunflower seeds is introduced to a 2-stage process. The feed contains 13.5 wt % oil and the balance is made up of a mix of components such as carbohydrates, protein, fiber, moisture, and ash. In the first stage, the seeds are pressed to remove oil, giving a pure oil stream and a stream of pressed sunflower seeds containing 5 wt % oil. In the second stage, a solvent is added to the pressed sunflower seeds resulting to two product streams: a stream of solvent-oil mixture containing 45% oil and a stream of extracted sunflower seeds containing 0.5 wt % oil. a. How much pure sunflower oil was obtained from the first stage of the process? 895 kg/h b. How much solvent is needed for the process? 503 kg/h c. How much unextracted oil is left in the seeds (the one leaving the second stage) stream? 43.5 kg/h