Hi, please list out the formulas where necessary , graphs where necessary , if the question doesnt require it, its fine not have it but please do put it down if it helps you to explain . Thank you!

Q6. A consumer lives for two periods. He has incomes Y1 and Y2 in the two different periods, and he can borrow or lend at an interest rate r. He maximises the lifetime utility function \"(02) Write down the consumer's budget constraint and substitute this into the lifetime utility function in order to nd the rst-order condition for consumption