Answer:
Question (a)
• We shall use masses of 200g, 50g, 20g and 5g.
[tex]{ \rm{200g + 50g + 20g + 5g = 275 \: g}}[/tex]
Question (b)
• We shall use masses of 500g, 200g, 50g, 20g and 5g.
[tex]{ \rm{500g + 200g + 50g + 20g + 5g = 775 \: g}}[/tex]
