please answer the questions in the image

A market supply curve has three prices $8.50, $9.00 and $9.50 with a quantity supplied of 6 tonnes at the price of $8.50, 10 tonnes at $9.00, and 14 tonnes at $9.50. a. Is this supply curve a straight line? 0 This curve is a straight line because it has a constant slope of 0.25. O This curve is a straight line because it has a constant slope of 0.5. O This curve is not a straight line because it does not have a constant slope. O This curve is a straight line because it has a constant slope of 0.125. b. What is the price elasticity of supply, es, between prices $8.50 and $9.00 and between prices $9.00 and $9.50? Do not round your interim calculations before obtaining the final solution [i_e_ do not clear your calculator). In each case, express the number to two decimal places and do not include a positive or negative sign [i_e_1_67, not 1.7 or +1567). The price elasticity of supply is between prices $8.50 and $9.00, and is between prices $9.00 and $9.50. c. Based on your answers to parts (a) and (b), must a supply curve with a constant slope have a constant numerical elasticity? O A supply curve whose slope varies must have a constant supply elasticity. O A supply curve whose slope varies has a supply elasticity which varies by exactly the same proportions. O A supply curve with a constant slope must have a constant supply elasticity. O A supply curve with a constant slope does not need to have a constant elasticity