According to the RuneScape manual you need:
Minimum Requirements:
Level 31 Crafting
Level 36 Woodcutting
Useful:
Ability to kill a level 101 spirit
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you need level 41 crafting you need level 41 crafting you need level 41 crafting
There are several items that have "banner" in their name; please clarify which one you need.In general, the crafting skill is one that can be assisted, but for some specific activities - especially quest-related activities - you yourself need to have the required level in certain skills.
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its one of the requirements yes
To get level 40 in a skill you need exactly 37,224 xp.