Kindly help in solving the questions

Consider the market for bicycles and explain the way in which the demand curve for bicycles would shift in response to each of the following scenarios: (a) Consumer incomes increase and some people will buy a mountain bike as well as a racer. (b) Consumer incomes increase and some people may now be able to afford a car and may no longer need to buy a bicycle. (c) The price of cars increases and more people may want to buy bicycles. (d) The price of bicycle crash helmets increases and fewer people may want to buy bicycles. (e) People may increasingly believe that cycling is a fun and trendy thing to do. (f) People may come to see cycling as "un-cool".A 10-year temporary annuity is payable continuously to a life now aged x. The rate of payment is 100 pa for the first 5 years and 150 pa for the next 5 years. Write down an expression in terms of 7, for the present value of this annuity. [3] (ii) Calculate the expected present value of the annuity assuming a constant force of interest of 0.04 pa and a constant force of mortality of 0.01 pa. [8] [Total 11]