What is the difference between a change in demand and a change

"Demand and Supply" Please respond to the following

• What is the difference between a change in demand and a change in quantity demanded?
• What is the difference between a change in supply and a change in the quantity supplied?
• Visit This Week in Business News and read all about what is happening to the price of oil.Prices are pushing back toward $40per barrel.Is that where prices will stay?
• Is the change in the price of oil due to a change in supply, a change in demand, or both?
• Identify at least one change in the quantity supplied caused by the change in the price of oil and identify at least on change in the quantity demanded caused by the change in the price of oil.

"Production Costs" Please respond to the following:

• Here is a chance for each of you to apply what we are learning to your real life. If you are a business owner, a manger in a business, a department head and there are lots of you in the class, you have a budget and you make decisions that effect fixed and variable costs. Share some of your insights on decisions that effect costs.
  • OR
• If you are thinking about owning a business here is a chance to think about what some of the costs of that business will be. Suppose you are asked by an investor to list some of the major costs of getting started, what would you say?
• Or simply think about that dream job you hope to land. Be ready to tell an interviewer about the relevant fixed and variable costs.
• Identify two (2) elastic and two (2) inelastic goods that you have purchased in the last month and explain the main reason why you identified them as such.