How to repair the support beam between the 2 garage doors?

A car hit the support beam located between two garage doors about 18 inches above ground, the support cement block under the beam is cracked and broke, the scratch coat and stucco are broke, cracked, the angle iron bolted to the post/beam are bent. This is a typical 3 car garage, 2 on one side one on the other side in S. CA. The beam is the dividing supporting beam between the doors and support the roof.

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