Mishna Perek 5

What does the term כבד ראש mean in the first mishna? What attitude should a person have before starting the Amida/Shemone Esrei? Answer in full sentences please...

Who were the חֲסִידִים הָרִאשׁוֹנִים?

What practice did they have regarding Tefilah every day and why did they do that?

What halachot illustrate the importance of not interrupting your Shemone Esrei/Amida?

What insertion is being referred to with the words

מַזְכִּירִין גְּבוּרוֹת גְּשָׁמִים

Where do we insert the Havdala in davening in Arvit/Maariv? Is there any disagreement on this matter? If so, who says what?

Why is a Shaliach Tzibbur/Hazzan recommended not to answer Amen after the blessing of the Cohanim? Does this halacha apply today? Why or why not?

הַמִּתְפַּלֵּל וְטָעָה, סִימָן רַע לוֹ

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שְּׁלוּחוֹ שֶׁל אָדָם כְּמוֹתוֹ

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What was unique about R. Chanina Ben Dosa?