On a large system, suppose we can upgrade a CPU to make it 150% faster for $8,000 or upgrade its disk drives for $5,000 to make them 50% faster. Processes spend 40% of their time running in the CPU and 60% of their time waiting for disk service. An upgrade of which component would offer the greater benefit for the lesser cost?

Which of the following statements is false? a. package access is rarely used. b. use the access modifier package to give a method or variable package access. c. classes in the same source file are part of the same package. d. if a program uses multiple classes from the same package, these classes can access each other's package access members directly through references to objects of the appropriate classes, or in the case of static members, through the class name.