1. (12 pts) The monthly cost (\$) of manufacturing a cellular phone is given in the table below. (a) Fill in the table below with the average rate of change of the cost for the given interval quantities of cell phones. Include units with each AROC. (b) How fast is the cost changing when 150 thousand cellular phones are produced monthly? Include correct units. (c) Write the cost function, C(x) for the cost of cellular phones. Box your answer. (d) What is the fixed cost for manufacturing cellular phones monthly