In an experiment you, the researcher, remove ATP from the system. What would be a likely consequence of the lack of ATP on muscle contraction?

The tropomyosin filament would not be dislodged preventing contraction.
The cross bridges would remain linked and therefore contraction would stop
The cross bridges would break apart due to the presence of calcium ions enabling some contraction
The myosin heads would separate from the actin molecule due to the release of ADP that was previously present.
Place the events of a contraction cycle in the order in which they occur.

1.ATP hydrolysis 
2.Detachment of myosin head from actin
3.Power stroke
4.Crossbridge formation