Hello, i need an urgent help. explain me the answer to this question step by step explaining each part in descrpitive format as well.

RMC$,$inc., is a small firm that produces a variety RMC$,$inc., is a small firm that produces a variety of chemical products. In a particular production process, three raw materials are blended $($mixed together$)$ to produce two products; a fuel additive and a solvent base. Each kilo of fuel additive is a mixture of $0\mathrm{.}4$ kilos of material $1$ and $0\mathrm{.}6$kilos of material $3.$ A kilo of solvent base is a mixture of $0\mathrm{.}5$kilos of materials $1,0\mathrm{.}2$ kilos of materials $2$ and $0\mathrm{.}3$kilos of material $3.$ After deducting relevant costs, the profit contribution is $40$ for every kilo of fuel additive produced and $30$ for every kilo of solvent base produced. RMC$`$s production is constrained by a limited availability of the three raw materials. For the current production period, RMC has available the following quantities of each raw material:

Raw Material Amount Available for production

Material $120$ kilos

Material $25$ Kilos

Material $321$ Kilos

Assuming that RMC is interested in maximising the total profit contribution,

$1.$ answer the following:

$($a$)$ What is the linear programming model for this problem?

$($b$)$ Find the optimal solutions using the graphical solutions procedure. How much kilos of each product should be produced, and what is the projected total profit contribution?

$($c$)$ Is there any unused material? If so$,$ how much?

$($d$)$ Are there any redundant constraints? If so$,$ which ones?

$2.$ Produce an Excel model and use Solver to replicate the Word$-$Processed calculation.of chemical products. In a particular production process, three raw materials are blended $($mixed together$)$ to produce two products; a fuel additive and a solvent base. Each kilo of fuel additive is a mixture of $0\mathrm{.}4$ kilos of material $1$ and $0\mathrm{.}6$kilos of material $3.$ A kilo of solvent base is a mixture of $0\mathrm{.}5$kilos of materials $1,0\mathrm{.}2$ kilos of materials $2$ and $0\mathrm{.}3$kilos of material $3.$ After deducting relevant costs, the profit contribution is $40$ for every kilo of fuel additive produced and $30$ for every kilo of solvent base produced. RMC$`$s production is constrained by a limited availability of the three raw materials. For the current production period, RMC has available the following quantities of each raw material:

Raw Material Amount Available for production

Material $120$ kilos

Material $25$ Kilos

Material $321$ Kilos

Assuming that RMC is interested in maximising the total profit contribution,

$1.$ answer the following:

$($a$)$ What is the linear programming model for this problem?

$($b$)$ Find the optimal solutions using the graphical solutions procedure. How much kilos of each product should be produced, and what is the projected total profit contribution?

$($c$)$ Is there any unused material? If so$,$ how much?

$($d$)$ Are there any redundant constraints? If so$,$ which ones?

$2.$ Produce an Excel model and use Solver to replicate the Word$-$Processed calculation.