Final answer:
The different types of statements in the excerpt engage the audience and call for a response, aiming to persuade them to take a different course of action.
Step-by-step explanation:
The persuasive effect of the different types of statements in the given excerpt is that they engage the audience and call for a response. The speaker is using rhetorical questions to challenge the audience and make them think about the ineffectiveness of previous approaches. By calling for action and emphasizing the need for a change, the speaker aims to persuade the audience to take a different course of action. For example, when the speaker asks, 'Shall we try argument?' and 'Shall we resort to entreaty and humble supplication?', they are seeking a response from the audience and encouraging them to consider different strategies.
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