please assist with A, B, & C

WestGas Conveyance, fac. WostGas Conveyance, Inc, is a large US. natural pas pipeine company that wants to raiee \$120 milion to fonance exparsion. WestGas wants a capial the rafes liated in the popop window: HH. Boeh debt and equity would have to be seld in muit ples or 520 milion, and these cost figures show tha componert costs, noch, of debt and equily if raised 50% by debt and 50% by equily. A London bark advises WestGas that U.8. dollars could be raised in Europe at the following costs, also in muliples of $20 milicn. while maintaning the 5050 capital structure. Each increment of cost would be influenced by the total amount of captal raised. That is, if Wesgas frat borrowed $20 milfion in the European market st 6% and matched this with an additional $20 millon of equaly, additonal debl beyond this amoum would oost 115 in tho United $ tates and 9% in Europe. The same relationship holds for equity financing. a. Calculate the lowest average cost of captal for ench increment of $40 milion of new capital, where WestGas raises $20 milion in the equity markat and an adesional $20 in the debt market at the same time. b. If WestGes pians an expansion of only $60 millon, how should that expansion be financed? c. What will be the weighted ayerage cost of capital for the expansion? Data table (Click on the 0 icon to import the table into a spreadsheet.)