Westside Energy charges its electric customers a base rate of $8.00 per month, plus 10c per kilowatt-hour (KWh) for the first 300 kWh used and 34 per kWh for all usage over 300 KWh. Suppose a customer uses x kWh of electricity in one month. (a) Express the monthly cost E as a piecewise defined function of x. (Assume E is measured in dollars.) if 0