Refer to question $7-25$ on page $282$ of your book.

Let $B=$ pounds of beef in each pound of dog food

$G=$ pounds of grain in each pound of dog food

a$.$ Select the formula to minimize cost.

Minimize

$cost$

subject $B+G=1$

$to$

$,10B+6G9$

$,12B+9G10$

$,B,G0$

b$.$ What is the minimum cost solution?

c$.$ Select the content of Vitamin $1$ using the minimum cost solution?

d$.$ Select the content of Vitamin $2$ using the minimum cost solution?