i need help w/ the last part, i keep getting it wrong. also do i need to add a "y=" or not?

The point P(5, 4) lies on the curve y = 4/(4 x). a If Q is the point x, 4/ 4 x , use your calculator to nd the slope m of the secant line PQ correct to six decimal places for the following values of x. PQ (i) 4.9 mg: 4.444444 (ii) 4.99 mm: 4.040404 v (iii) 4.999 me= 4.004004 (iv) 4.9999 mm: 4.000400 (v) 5.1 mp0 = 3.636364 (vi) 5.01 mm: 3.960396 v (vii) 5.001 me= 3.996004 (viii) 5.0001 mm: 3.999600 (b) Using the results of part (a), guess the value of the slope m of the tangent line to the curve at P(5, 4). m = 4 y (c) Using the slope from part (b), nd an equation of the tangent line to the curve at P(5, 4). 4x 24 X