How can you qualitatively tell the strength of an overall dipole moment or bond strength?

I m studying for my final and I m not too clear on this topic. For example:

Rank in order of decreasing overall dipole moment: CH4, IF5, H2Se, SiHCl3

Arrange the following bonds in order of decreasing bond strength: Ge-Te, Ge-S, Ge-N, Ge-O

Thank you so much for any help.
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