Hi please write clean because I have hard time of seeing thank you Hi I need help on number 5 letters D AND E and number 6 letters A,B AND C for number 6 you have to use stacks for all of them just for number 6

I need help on number 3 letters A B C

I need help on number 6 and 7

one CIS-277 Data Structures and Algor it.hee Revieu: ADT-Stack 1define the AOT: stack b explain what is contained in a stack frame. c name three applications of stacks 2Complete the following (answer: true or false): stack is used by the system when a function call is nade 6 a stack can become full during program execution t he postfix expression: 3 4evaluates to: 23 the pos t fix expression: S 2*-63- - 3. Show how an oper and stack is formed and ALL of its various stages in computing the value of the postfix expression b. 8238122 d. Transfora the infix expression to postfix form.Do NOT use the 412514 infix to postfix conversion aloorithm 5 Use the infix to postfix conversion algoritha to transform the infix expression to postrix formi ua stces ABC-DE Tr ansform the postfix expression to infix form Show ALL the step ABCDE CABCDEEF 7 Given that a stack already exists and given t he stack toolki push s.i) pop( s,i ) wr ite just a sequence of statements to assion to: answer a cop of the third element in the stack (the top eleaent is the tarst leaving the stack unchanged (assume the stack has at least thrge i tems). Do not write a function and do not declare any vas iables