I need help filling in the blanks. #1-5 please.

IN EACH OF THE FOLLOWING QUESTIONS, THERE IS A GAP. FILL IN THE GAP WITH THE APPROPRIATE WORD OR PHRASE. (TYPE IN YOUR ANSWERS ON THE SPACE(S) PROVIDED FOR EACH QUESTION) 1. is the underlining assumptions Economists make when they say that Welfare economics can be used to analyze the cost and benefits of policies and market imperfections. 2. A producer whose willingness to sell a product is $10 less than what he/she sold it is said to have made equal to 3. At a market price of $10, only 5 consumers purchased the good. However, when the price decreased to $5, 15 consumers purchased the good. The name given to the additional consumers is 4. You can determine by subtracting the actual value paid by a consumer from the value the consumer places on the item 5. Is a market where demand for a good go to the producer who can produce the good at the lowest cost