1. If price were increased from $25 to $26 and quantity demanded fell from 10 to 9, calculate elasticity; state whether demand is elastic, unit elastic, or inelastic; and find out how much total revenue was when price was $25 and $26.
2. If price lowered from $10 to $8 and quantity demanded rose from 50 to 51, calculate elasticity; state whether demand is elastic, unit elastic or inelastic and find out how much total revenue was when the price was $10 and $8.