$26\mathrm{.}4$ The Optimal Scam Company would like to see its sales grow at $20$ percent for the

foreseeable future. Its financial statements for the current year are presented below.

The current financial policy of the Optimal Scam Company includes

Dividend$-$payout ratio $(d)=70\%$

Debt$-$to$-$quity ratio $(L)=77\mathrm{.}78\%$

Net profit margin $(P)=6\mathrm{.}25\%$

Assets$-$sales ratio $(T)=1$

a$.$ Determine Optimal Scam's need for external funds next year.

b$.$ Construct a pro forma balance sheet for Optimal Scam.

c$.$ Calculate the sustainable growth rate for the Optimal Scam Company.

d$.$ How can Optimal Scam change its financial policy to achieve its growth objective?