Task There is a reverse Polish line, which is used to describe formal expressions, for example 1 + 2 Reverse Polish line looks like this: 1 2 + Operands go first, and then operations, but to express: 1+2+3 Reverse Polish line looks like this: 1 2 + 3 + You are given an arithmetic expression (numbers, +,-), expressed in the reverse Polish line. Your task is to calculate the value of this expression in one pass through it. Need to be used stack data structure. Your solution should contain manually written functions, structures, classes and correct usage of all language structures we've learned: methods/functions lists structures Your code should be designed correctly and we suggest you follow the code style of C++. Also, prepare 3 tests proving that your algorithm works correctly