Aprogram is seeded with 30 faults. during testing, 21 faults are detected, 15 of which are seeded faults and 6 of which are indigenous faults. what is the mill's estimate of the number of indigenous faults remaining undetected in the program?

A)-in the process of engineering design, explain the contribution of material selection. b)- explain the procedure of synthesis as is employed in engineering design. c)- is there any relationship between ergonomics and engineering design? explain. d)- safety consideration in engineering design includes human, product and the enviroment . explain how safety will be incorporated into the design?