What Belts Do I Need?

Hi, theres a slight whine from my belts so im looking to get them changed. What belts do i need i have a 1997 gx with NO powersteering or air con. Fans are electric i think < pic of engine... thanks for any advice in advance.
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a 6pk675 for the alt, and a 4pk648 for the waterpump i believe finto (tho i bin the w/p idler and fit a 4pk613 on mine :) )
 
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