COMP SCI PLEASE HELP C++

Ullowing point t to the stack so that 'A'is the top element. o a stack, write C++ statements to add the characters 'B' and 'A ArrayStackschars stackPtr new ArrayStack(): ck. points) Evaluate the following RPN (postfix) expression using a sta Assume A 2, B 4and C 6. 3. (10 ABC+ CBA-+* Ullowing point t to the stack so that 'A'is the top element. o a stack, write C++ statements to add the characters 'B' and 'A ArrayStackschars stackPtr new ArrayStack(): ck. points) Evaluate the following RPN (postfix) expression using a sta Assume A 2, B 4and C 6. 3. (10 ABC+ CBA-+*