Explain the following A and B below

(A) The AWCC 4G services in recent months has seen many more internet services sell at much Higher prices. What shift in demand curve is most likely to explain this outcome? Sketch a demand diagram and give details about reasons for rise in demand for 4G internet in market.

(B) Demand is the heart of a firm, because a firm can gain profit, bring innovation or creativity and remaining survival in the market. How the creativity, survival and profitability is depend upon to the demand of a firm? give two examples ( a corporation which is still survival and a corporation which is withdrawal from market, due to demand )