1. for each case below, decide whether a given language is a cfl, and prove your answer by constructing a pda or using the pumping lemma. a. l = { x { a, b, c }* | na(x) < nb(x) and na(x) < nc(x) }, where ni(x) is the number of occurrences of symbol i in x. b. l = { xayb | x, y { a, b}* and |x| = |y| } c. l = { xcx | x { a, b}* } d. l = { x{ a, b, c}* | na(x) = min(nb(x), nc(x)) } e. l = { w | w { a, b, c }*, numc numa + numb } f. l = { 0i1j | 2j i 4j }

Jasper and samantha are in a robotics competition. the guidelines state that the robots should be able to move a 10-gram weight at least 2 meters and turn in a circle. jasper and samantha have already built the robot. which step of the design process should they follow next to decide whether their robot meets the minimum criteria for the competition?

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

Arecipients list has been loaded into a document. which commands should be clicked in order to filter the list so that letters will not be printed for recipients who live in a certain state? mailings tab, start mail merge, select recipients, type new list, then insert only contacts from the desired states mailings tab, rules, select recipients, use existing list, then choose a recipients list that includes only contacts in certain states mailings tab, select recipients, use existing list, rules, fill in, then type in certain states mailings tab, rules, skip record select “state” under field name, then type in the state name under “equal to”