Write a context-free grammar in the form of BNF notation to satisfy the following requirements, Write a grammar for the "for" statement in Python. The grammar should only satisfy the following examples. In Python "for" loops can be written in many other forms. We do not intend to satisfy the forms which their examples are not presented here. In example 1, "i" is a variable and the list [45, 6, 7, 78] can have any number of members. Members of the list can only be numbers. In example 2, "key" and "value" are variables separated by commas, and the list [(11,12), (3,4), (5,7)] is a list of tuples. Variables only consist of alphabet characters.

Check my work the microprocessor is a(n) circuit, which is designed to process data based on a set of instructions. most desktop and laptop devices contain a microprocessor based on the standard. most tablets and smartphones contain processors based on technology. a microprocessor's circuitry is designed to perform a limited number of tasks contained in its set. during processing, an instruction is loaded into the processor's unit. data is loaded into registers in the processor's where arithmetic and logic operations are performed. microprocessor performance can be measured by its speed. other factors affecting overall processing performance include word size, cache size, and instruction set complexity. most digital devices contain only one microprocessor chip, but today's multi- processors contain circuitry that supports parallel processing. computers contain various kinds of memory. random memory is a special holding area for data, program instructions, and the system. it stores data on a temporary basis until the processor makes a data request. ram is different from disk storage because it is , which means that it can hold data only when the computer power is turned on. computers also contain read- memory, which is a type of non-volatile memory that provides a set of "hard-wired" instructions, called the loader, that a computer uses to boot up.

10. when you create a pivottable, you need to specify where to find the data for the pivottable. is it true

An npn transistor is correctly biased and turned on if the a. base is negative. b. collector is negative. c. collector is positive with respect to the emitter and negative with respect to the base. d. collector is the most positive lead followed by the base.