Draw diagrams showing a conceptual view and a process view of the architectures of the following systems: a. A ticket machine used by passengers at a railway station. b. A computer-controlled video conferencing system that allows video, audio, and computer data to be visible to several participants at the same time. c. A robot floor-cleaner that is intended to clean relatively clear spaces such as corridors. The cleaner must be able to sense walls and other obstructions.

Write code using c . (take input from user) calculate the size of a given file in kbs. in this task you will complete the function with the following prototype: float get_file_size(char * filename); the function takes the file name (address to the start of a null terminated character array) as input. the function should then open the file and find the number of bytes it contains till eof. the number of bytes divided by 1024 will give the size in kbs. if the file cannot be opened the function should return -1.

Acetylene is a gas which burns rapidly on its own, and is considered highly explosive. a) true b) false

Which is the correct sequence of steps to set up a document in landscape orientation? a. select page setup from the file menu. then click the margins tab and select landscape. b. select page setup from the edit menu. then click the margins tab and select landscape. c. select page setup from the insert menu. then click the margins tab and select landscape. d. select page setup from the format menu. then click the margins tab and select landscape