Consider a demand curve given by $P=5-\frac{Q}{2}.$

Which of the following could describe the good becoming less expensive?

A movement from point $)=8,P=(1$ to point $)=6,P=(2$;

A movement from $)=0,P=(5$ to $)=6,P=(2$;

The curve shifting to $P=2-\frac{Q}{2}$;

The curve shifting to $P=10-\frac{Q}{2}$;