(1) In Tamara's science class, the students are learning Which sentence shows an action that is extrinsically about the solar system. (2) Tamara is very excited
motivated?
because she has always been interested in anything
having to do with space. (3) However, she receives a low O sentence 2
grade on her test on the solar system.
sentence 3
(4) She is determined to get a better grade on the next
test, so she assigns herself a demanding study schedule. O sentence 4
(5) Tamara reads some unassigned extra books on the
O sentence 5
solar system to learn more about the subject on her own.

A-12.3 an american spy is deep undercover in the hostile country of phonemia. in order not to waste scarce resources, any time he wants to send a message back home, he removes all the punctuation from his message and converts all the letters to uppercase. so, for example, to send the message, “abort the plan! meet at the dark cabin.” he would transmit given such a string, s, of n uppercase letters, describe an efficient way of breaking it into a sequence of valid english words. you may assume that you have a function, valid(s), which can take a character string, s, and return true if and only if s is a valid english word. what is the running time of your algorithm, assuming each call to the function, valid, runs in o(1) time?