How does the life cycle and the permanent income hypothesis resolve the seemingly contradictory pieces of evidence regarding consumption behaviour?

Suppose you know the following facts about consumer behavior of Amy in 2019. In a year, Amy spends $10000 on basic household items regardless of how much she is earning. For every dollar of disposable income earned, Amy spends 50% on extra purchases. Amy pays taxes in the amount of $1000, and receives no transfers. Use this information to:  Derive Amy’s consumption function in nominal terms. Suppose the price level index in the economy for 2019 is estimated to be P = 2. Rewrite the consumption function in real terms.

Please no written by hand solution

2.1 According to the permanent income hypothesis, how will a representative consumer's bor- rowing and consumption respond to: 1. An anticipated temporary decrease in income at t = 2. 2. An anticipated permanent decrease in income (at time periods t = 1 and t = 2) when it occurs. 3. Are the answers different if the changes in income are unanticipated, i.e. if they come as a surprise to the consumer? Comment on the size of the marginal propensity to consume.