Can someone correct my work and explain thank you.

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A manufacturer can produce 4050 cell phones when a: dollars is spent on labor and y dollars is spent 2 l on capital. The equation that relates a: and y is 7556 4 y 4 = 4050. d a. Find a formula in terms of :c and y for dy. a: dy 252509,168 d2: 33 d b. Find the value of of (Ty at the point (81,16). -25,509,168x"{-4} x Round to 4 decimal w places. 2 Find all local extreme values of f(a:) = :c3 + 8:1:2 30x 100. 3 The FIRST local extreme value, moving from left to right on the graph, is a x at (3,5) x . The SECOND extreme value, moving from left to right on the graph, is a x at m24w+3 Consider the function at) = :1: + 2 a. Find the first derivative. f'(m) = b. List any critical values. V'15X syntax incomplete. c. Identify intervals of increase. _((1:)): d. Identify intervals of decrease. 2 2 + V1 e. Find the second derivaitve. f ' '( (m + 230)3 f. Based on parts b through e, f(a:) )has a maximum of y 3O T/Ei515 x when as 2 v 15 ~/ g. Based on parts b through e, f(a:) has a minimum of y = W J when a: = 2 + v 15 ~/ h. Use the second derivative to identify intervals where at) is concave up. (2,oo) J i. Use the second derivative to identify intervals where f(a:) is concave down. ( ) j. Use the second derivative to find any inflection points. _ 1 8 do