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Problem $11\mathrm{.}053-$ Two waves with identical frequency and different amplitudes $-$ DEPENDENT MULT PART PROBLEM $-$ ASSIGN ALL PARTS

Two waves with identical frequency but different amplitudes $A_1=6\mathrm{.}50cm$ and $A_2=2\mathrm{.}30cm$ occupy the same region space $($i$.$e$.,$ are superimposed$).$

Problem $11\mathrm{.}053.$a $-$ Constructive interference $.$

What is the amplitude of the resulting wave if they interfere constructively?

$cm$