25. 3D printing is 1. an emerging technology with few practical usese 2. used to make solid objects from filaments or powder 3. used more in homes than in commercial settings 4. an extremely high-resolution form of 2D printing tt tttt a. 1 c. 2,3 e. 2,3,4 b. 2 d. 3,4 26. The OS installed in automobiles to control the car's functions (such as brakes, air bag...) is known as a. a multi-user operating system b. an embedded operating system c. an enterprise operating system d. mobile application software e. an automobile operating system 27. What is the disadvantage of proprietary software? a. it is hard to control the output even if one is involved in the development of the software b. it can take a long time and significant resources to develop the required software features e c. it does not allow the modifications to features needed to counteract a competitor's initiative d. it is difficult to achieve what is required in terms of features and reports e. none of the above 28. When a math and graphics chips are working in parallel to the CPU, this processing approach is called a grid computing with a central server b. a massively parallel processing system c. parallel processing using coprocessorse d. multiprocessing using coprocessors e. none of the above- ttttt