b$)$ XYZ Sdn Bhd is currently encountering an increase in demand and the trend is

expected to last for $10$ years. To cope with this demand, the company has laid down

three options as listed in Table Q$4($b$).$

Table Q$4($b$)$

With the aid of a cash flow diagram, evaluate the options using present worth and

suggest which option is minimum. Assume the interest rate is $6\%.$ You must show the

step$-$by$-$step calculation.