Study Guide Nazir 9

One who vowed to be a nazir not to eat figs, is that person considered a nazir? Are they forbidden from eating figs? Or is it just an absurd statement that means nothing? Beit Hillel and Beit Shamai disagree about this case. There are three different explanations about what Beit Hillel and Beit Shamai actually hold. According to one of the interpretations, Beit Hillel's opinion is based upon an opinion of Rabbi Shimon in a Minha in Menachot 103a. That Mishna is brought and Chizkiya and Rabbi Yochanan disagree about two issues in that Mishna. Firstly, to whom does tanna kama's opinion correspond? What would be the case if the declaration there was made with lentils instead of barley (the Mishna's case is with barley)?