Please help me on this and answer all question. Thanks!!

4. Now assume operations take any number of arguments. Draw the AST for the following expression. Put the expression into s-expression form (strictly parenthesized prefix notation). 5 * 7 2 3 4 * 1 5. Assume operations take any number of arguments. Draw the AST for the following expression. Put the expression into s-expression form (strictly parenthesized prefix notation). 9 5 3 * 2 1 6. Using innermost leftmost evaluation order, show each textual simplification, one at a time, to evaluate the s-expression from (#4)