4. what is the first step in threading the lower part of the sewing machine is to a. make sure that you hear the case being locked upon inserting the bobbin case inside the shuttle. b. pull the upper and lower thread together by 4 inches. c. put the bobbin back to the bobbin case and pull the thread through the little slot by at least 4 inches. d. remove the bobbin case by pulling on the bobbin case latch. 5. What is the most suitable fabric for beginners. a. brocade c. satin b. cotton d. velvet