(Solved): a) Calculate the values of \( x \) and \( y \), in the following diagram, giving reasons for each. ...

a) Calculate the values of \( x \) and \( y \), in the following diagram, giving reasons for each. [4 marks] b) The masses of 160 students who attended a workshop were recorded as follows: (i) Calculate the mean mass of the students, correct to I decimal place [5 marks] (ii) Draw a histogram to show the above information. [5 marks] c) Andrew booked a room at the Slecpwell Lodge. He stayed there for 3 nights and had breakfast on 2 momings. His bill amounted to USS145. If he paid JS 20000 , how much balance would he reccive in Jamaican dollars? Given USS \( 1.00=15114.50 \) [3 marks] d) The marked price of a scientific calculator is \( \$ 2,000 \). If a discount of \( 15 \% \) is given and a tax rate of \( 16.5 \% \) is applied on the price after discount, what is the selling price of the calculator? [3 marks]