$9500 is invested, part of it at 12%, and part of it at 9%, for a certain year, the total yield is $1032.00. how much was invested at each rate? . how much was invested at 12%. how much was invested at 9%.

Trade will take place: a. if the maximum that a consumer is willing and able to pay is less than the minimum price the producer is willing and able to accept for a good. b. if the maximum that a consumer is willing and able to pay is greater than the minimum price the producer is willing and able to accept for a good. c. only if the maximum that a consumer is willing and able to pay is equal to the minimum price the producer is willing and able to accept for a good. d. none of the above.