4.
Solder R3 (10k resistor, no polarity, colour bands:
brown
-black-
orange
)
and C5 (0.1uF capacitor with long leads, no polarity, marked 104), trim
excess leads from back of PCB.
5
Q1 (16Mhz crystal)
with C1 and C2
(22pF capacitors)
R3 (10k resistor)
and C5 (0.1 uF
capacitor)