Refer to the following spreadsheet with the optimal solution

$\backslash$table$[[,A,$B$,$C$,$D$,E,$F$,$G$,H,$I,J$],[1,,$Project Manager $-$ Assignment Model,,,$],[2,,,,,,,,,,],[3,,4,$Projects $($weeks to complete$),$RHS$,,,],[4,,\backslash$table$[[$Project$],[$Mgr$]],$A$,$B$,C,,$Supply,,,$],[5,,1,37,29,42,,1,,-,],[6,,2,28,33,47,,1,,,],[7,,3,38,37,36,,1,,,],[8,,4,34,35,42,,1,,,],[9,$RHS$,$Demand,$1,1,1,,,,,],[10,,,,,,,,,,],[11,,,,,,,,,$TOTAL TIME,$93],[12.,,$Decision Variable Cells,,LHS$,,$RHS$,,],[13,,,A,$B$,$C$,$Assigned,,Supply,,$],[14,,1,0,1,0,1,,1,,],[15,,2,1,0,0,1,,1,,],[16,,3,0,0,1,1,,1,,],[17,,4,0,0,0,0,,1,,],[18,$LHS$,$Assigned,$1,1,1,,,,,],[19,,,,,,,,,,],[20,$RHS$,$Demand,$1,1,1,,,,,],[21,,,,,,,,,,]]$

Which type of linear programming model is this problem?