John has 24 hours of free time a clay and he can choose to work for as many hours as he wants. The wage rate is 15 per hour. a) Explain clearly using diagram{s} how John can choose how many hours he works a day. bi If the wage rate falls to 10 per hour, illustrate and explain clearty how this change might affect John's choice differentiating between the income and substitution effects of the wage change. cl The British Economist Maynard Keynes' prediction that working hours would fall to 15 hours per week in the century after 1930. Explain why working hours may haye not changed as Keynes expected