Show me the steps to solve $1.(3$ points$)$ Moving along a demand curve, quantity demanded increases $2\mathrm{.}5$ percent when price decreases $5$ percent.

a$.$ The price elasticity of demand is calculated to be $\_\_\_\_\_\_\_\_.$

b$.$ Given the price elasticity calculated in part a$,$ demand is $\_\_\_\_\_\_\_\_($elastic$,$ inelastic, unitary elastic$)$ along this portion of the demand curve.

c$.$ For this interval of demand, the percentage change in quantity in absolute value is $\_\_\_\_\_\_\_\_($greater than, less than, equal to$)$ the percentage change in price in abso$$lute value.