input: Write a function to generate a SQL query to select all columns from a given table and order by col1 ascending and col2 descending.
  assert query_table('employees') == 'SELECT * \n            FROM employees \n            ORDER BY col1, col2 DESC'
  assert query_table('products') == 'SELECT * \n            FROM products \n            ORDER BY col1, col2 DESC'
  assert query_table('sales') == 'SELECT * \n            FROM sales \n            ORDER BY col1, col2 DESC'
output: def query_table(table_name):
      return f'SELECT * \n            FROM {table_name} \n            ORDER BY col1, col2 DESC'