Which telescope (if any) is most financially attractive? Show the comparisons and external rates of return used to reach this decision: Comparison1:Comparison2:Comparison3:Comparison4:ERR1:ERR2:ERR3:ERR4:%%%% Which telescope (if any) is most financially attractive? Show the comparisons and external rates of return used to reach this decision: Comparison1:Comparison2:Comparison3:Comparison4:ERR1:ERR2:ERR3:ERR4:%%%%