despratly need help with belts
 

I have a 75 280c with a inline 6 the belts were half missing and the fan belt broke on me I bought 3 belts at napa they told me it has 3 anyway and I have no clue where they all go can someone please draw me a diagram or tell me wich pulleys each belt goes around I would greatly appreiciate any help.

I have never owned a '75, which has one more than my '73.

a - altenator & water pump (second longest)
b - power steering pump (shortest)
c - air pump (second shortest)
d - AC compressor & idler pulley (longest)