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What is the magnitude of the satellite's acceleration?

So I tried to solve it by adding all the FnetX, and Fnet Y

Fnet x= 31.8 cos 31 + 54.7 + 40.0 cos 60.2

= 27.2579 + 54.7 + 19.8789584

= 101.8368786 N

Fnet y= 31.8 sin 31 - 40.0 sin 60.2

= 16.37821 - 34.71061813

= -18.332408 N

tan θ = 101.8368786 / -18.332408

θ = -79.79506177

sin θ = Fnet x/ Fnet

sin (-79.79506177) = 101.8368786/ Fnet

Fnet = -103.47 N

Fnet = ma

a = Fnet/m

a = -103.4737987 N/121 kg

a = -0.85 m/s^2

But apparently it's wrong, can someone help please?