この問題は簡単なはずです。

N5 この kono this N5 問題 mondai problem, question N4 簡単 kantan simple, easy, brief N4 はず hazu logical expectation, should be

N4 問 mon / to.u, to.i, ton question, ask, problem N4 題 dai topic, subject, sujet N2 簡 kan, ken / era.bu, fuda simplicity, brevity, simplicité N3 単 tan / hitoe simple, one, single

N4 〜はずだ hazu da Indicates logical expectation based on known information, attaches to verb adjective or noun, means should or must be N5 〜です desu Used at the end of a sentence, polite affirmative form, means to be depending on context N5 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context N5 〜の no Indicates possession, relation between nouns, nominal explanation, or turns a verb into a noun phrase N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information