Q: Would want Help in understanding and solving this example from Data Structure & Algorithms (Computer Science) with the steps of the solution to better understand, thanks.

##Using Python language and the code to use provided below, thanks.

In this assignment, we will implement a function to evaluate an arithmetic expression. You will use two stacks to keep track of things. The function is named evaluate, it takes a string as input parameter, and returns an integer. The input string represents an arithmetic expression, with each character in the string being a token, while the returned value should be the value of the expression.

*Using this in bold to start with:

from ArrayStack import ArrayStack

def evaluate (expression):

return -1

Examples: evaluate ('1+2*3') 7

evaluate ('1*2+3') 5