The following table contained the information necessary for the determination of the own$-$price elasticity of three goods I, II and III but some of this information are now missing Own$-$Price Elasticity $\%$ change in Quantity $15\mathrm{.}95\%$ C $\%$ change in Price Demand for good I $-20\mathrm{.}85\%$ Demand for good II $12\mathrm{.}25\%$ Demand for good III b $-2\mathrm{.}75$ a $25\mathrm{.}48\%-1\mathrm{.}5$