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4. Parts of this problem are not related. {a} The demand equation for a certain product is 5q+pq+p2=19 where q is the quantity demanded in units of hundreds and p is the unit price in dollars Use implicit difrentiation to the nd elasticity of demand at p = B. Is the demand elastic or inelastic or unitary at this price? [1]} Suppose that g and g' are continuous functions such that 9hr] = lI and 91er = 2. Evaluate lirn g{I}1i5'-"{IJI 1} 1T