4. (a) A $8,500, 30-month loan with an annual simple interest rate of 5.75%. Using the formula I = p* r*t for simple interest, (i) What is the simple interest charged on this loan (1 mark)? Show your steps for the calculation (1 mark). (ii) What is the amount (i.e. principle plus interest) need to pay at the end of the 30 months in order to pay off the loan (1 mark)? Show your steps for the calculation ( 1 mark). (b) A loan of $2,400 has to pay back an amount of $2,880 after 30 days. What is the annual interest rate (2 marks)? Show your steps for the calculation (5 marks) (c) An item is purchased at $250,000, and a down payment of $50,000 is needed. You finance for the reminding balance and need to make a payment for 60 months with an amount of $4,103.3 each month. (i) What is the total installment price (1 mark)? Show your steps for the calculation (2 marks). (ii) What is the finance charge (1 mark)? Show your steps for the calculation (2 marks). (d) From the temperature records (in C) below, state the number of count, maximum, minimum, mean, mode and medium of the data (6 marks, 1 mark each) 24 25 26.5 27 24 22.3 21.5 25.7 22.6 23 26 26.3 23 22.8 24.9 22 23.2 87 26 22.2 23.1 21.2 27.3 25 22.8 (e) Make one observation from this data set (2 marks) or Eu