Shashin has 4P dollars that he wants to invest in a savings account earning an interest rate of r at the end of every two weeks. Nimish suggests an alternative: that Shashin instead open four different savings accounts with the bank (all earning the same rate, r at the end of every two weeks), and invest P dollars into each of them. This way Shashin can take advantage of the great interest rate even more! Help Shashin determine which strategy to adopt.