$\backslash$table$[[$table set,,,,,,,$],[$Televisio$,,,,,,,],[n,,,,,,,],[$Living$,,,,,,,],[$room set,,,,,,,$],[($couches$,,,,,,,],[$s$,,,,,,,]]$

b$.$ Suppose your parents bought a bond house for R$780000$ on higher purchase, the bond balance is currently R$853592\mathrm{.}99$ which payable over $20$ years. How much is the interest rate?

$(3)$

c$.$ How much are your parents paying monthly for the bond?

$(1)$

Rubric for assessment of letter a of higher purchase project:

$\backslash$table$[[$Criteria$,1,2,3,4],[$Cash price,$\backslash$table$[[$Writing$],[$cash price$],[$for some of$],[$the goods$]],\backslash$table$[[$Writing cash$],[$price for all$],[$the goods$]],,],[$Deposit$,$Writing,Writing,,$]]$