input: Write a python function to scrape webpage content and store specific elements in a list.
  assert scrape_webpage('<url of the webpage>', '<element tag>') == ['<expected content 1>', '<expected content 2>']
  assert scrape_webpage('<another url of the webpage>', '<another element tag>') == ['<expected content 3>', '<expected content 4>']
  assert scrape_webpage('<yet another url of the webpage>', '<yet another element tag>') == ['<expected content 5>', '<expected content 6>']
output: def scrape_webpage(url, element_tag):
      import requests
      from bs4 import BeautifulSoup
  
      response = requests.get(url)
      soup = BeautifulSoup(response.content, 'html.parser')
      elements = soup.find_all(element_tag)
      
      return [element.get_text() for element in elements]