Question

I need help with finding the rest of the missing things..like the current (I), resistance, and voltage (v)

Answer 1

The total current is 1.5 A.
You know how much goes through the two bulbs.
The rest goes through the single bulb.

The single bulb is connected to the full battery voltage.

The resistance of the single bulb is V/I. (It turns out to be the same as the other 2 bulbs.)

The voltage across