Use the table below to answer the following question$($s$).$

Qualis Investments is a private limited business that manages personal financial portfolios. The company manages six mutual funds and has a client that has acquired $$750,000$ from an inheritance. Characteristics of the funds are given in the table below.

$\backslash$table$[[,$Qualis Mutual Fund Data,,$],[,,\backslash$table$[[$Expected Annual$],[$Return$]],$Risk Measure$],[1,$Qualis Low$-$priced Stock Fund,$7\mathrm{.}23\%,11\mathrm{.}87],[2,$Qualis Multinational Fund,$8\mathrm{.}42\%,12\mathrm{.}62],[3,$Qualis Mid$-$cap Stock Fund,$6\mathrm{.}66\%,13\mathrm{.}72],[4,$Qualis Mortgage Fund,$2\mathrm{.}72\%,3\mathrm{.}37],[5,$Qualis Income Equity Fund,$8\mathrm{.}89\%,8\mathrm{.}4],[6,$Qualis Balanced Fund,$3\mathrm{.}50\%,6\mathrm{.}91]]$

The company recommends that no more than $$300,000$ be invested in any individual fund, and that at least $$80,000$ be invested in each of the mid$-$cap stock and mortgage fund. The total amount invested in the low$-$priced and multinational funds are at least $35\%$ of the total investment. The client would like an average return of at least $6\%.$ Assume that $x_1-x_6$ represent the dollar amounts invested in funds $1$ through $6,$ respectively.

Which of the following is the constraint for the weighted return?

$x_1+x_2+x_3+x_4+x_5+x_6=750,000$

$\frac{7\mathrm{.}23x_1+8\mathrm{.}42x_2+6\mathrm{.}66x_3+2\mathrm{.}72x_4+8\mathrm{.}89x_5+3\mathrm{.}5x_6}{750},0006\mathrm{.}00$

$\frac{7\mathrm{.}23x_1+8\mathrm{.}42x_2+6\mathrm{.}66x_3+2\mathrm{.}72x_4+8\mathrm{.}89x_5+3\mathrm{.}5x_6}{750},000$

$7\mathrm{.}23x_1+8\mathrm{.}42x_2+6\mathrm{.}66x_3+2\mathrm{.}72x_4+8\mathrm{.}89x_5+3\mathrm{.}5x_{6}6\mathrm{.}00$