Assume that the myname. txt file is currently closed. write the code segment that opens the file without erasing it, write another name to the file so that it is appended to the end of the file's existing data, and close the file.

Consider the usual algorithm to convert an infix expression to a postfix expression. suppose that you have read 10 input characters during a conversion and that the stack now contains these symbols: (5 points) | | | + | | ( | bottom |_*_| now, suppose that you read and process the 11th symbol of the input. draw the stack for the case where the 11th symbol is