In the article PepsiCo's Chief Executive Ramon Laguarta stated that the company's "...recent price increases haven't turned away consumers. 'We have consumers following us in spite of higher prices,' ..." Briefly explain why each of the following statements is either true or false: (a) the quantity demanded of PepsiCo's products increased in response to price increases for these products; (b) the demand for PepsiCo's products is perfectly price-inelastic; (c) the demand for PepsiCo's products is relatively price-inelastic.