Hi, Kenneth. Your working is very helpfull. I appreaciated you. while I reviewing your code , I faced error. This error is occured in code snippet below;

input_t = K.Input(shape=(32, 32, 3)).

This code means model need input which has size (32x32x3). But Resnet expect input which has size (224, 224, 3). If we ran model you built, we'll faced error like this;

"ValueError: Input 0 is incompatible with layer resnet50: expected shape=(None, 32, 32, 3), found shape=(None, 224, 224, 3)".

Solution:
You should change code such as below;
input_t = K.Input(shape=(224, 224, 3))