Federer & Co$.($Federer$)$ signed a written contract to lease a large

neon advertising sign to Harris Bolat, who is in the dry$-$cleaning

business, for $$148\mathrm{.}50$ a month. The contract stated that Federer, a

the lessor of the sign, would $"$at its expense $...$ maintain and

service the sign $...[$and would perform$]$ cleaning and repainting of

sign in original color scheme as often as deemed necessary by

lessor to keep sign in first$-$class advertising condition and make all

necessary repairs to sign and equipment installed by lessor."

A few weeks the sign was installed, "little spider cobwebs"

appeared in the sign's corners. Bolat repeatedly asked Federer to

fix the sign, but Federer did not do so$.$ As a result, Bolat made no

further payments and Federer sued Bolat for remainder of the

lease payments pursuant to the contract's terms. Did Federer make

a material breach of the contract?