help with these 3 problems

Write a matrix equation that determines the loop For each matrix, let row 1 correspond to loop 1, row 2 correspond to loop 2, and so on, Also, enter positive values for positive voltages and negative values for negative voltages. currents. 38 '2 28 393 C11) I3 = 21 I -15 28V: Write a matrix equation that determines the 60 v 40 v loop currents shown to the right. 320 20 I1 50 30 40 M 15 20 40 12 13 320 36 v 26 . . . Complete the matrix equation. 60 - 36 26 - 40 14 0Study how changes in boundary Plate A Plate B Plate C temperatures on a steel plate affect 30 30 30 30 the temperatures at interior points on the plate. Complete parts (a) through (c) below. Oo 2 0 150 2 150 150 2 150 0o 14 3 0 150 14 3 150 150 14 3 150 30 300 150 150 450 450 . . . a. Begin by estimating the temperature T1, T2, T3, T4 at the sets of four points on the steel plates A and B shown in the figure. In each case, the value of Tx is approximated by the average of the temperatures at the four closest points. The answer should be in the form (T1, T2, T3, T4). Plate A interior temperatures = ( (Type integers or decimals. Do not include the degree symbol in your answers.)