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<h2 class="hd hd-2 unit-title">Overview</h2>
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<h3 class="hd hd-2">Overview</h3>
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<h2 class="hd hd-2 unit-title">Handouts</h2>
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<h3>Lecture slides for Unit 4a are available here:</h3>
<h3>- <a href="/assets/courseware/v1/c6d19c077138cdff0a731bbce86fa40d/asset-v1:MITx+15.480x+3T2021+type@asset+block/Unit_4a_-_Part_1.pdf" target="_blank">Unit 4a, Part 1</a>.</h3>
<h3>- <a href="/assets/courseware/v1/6428fa793f2568dc5e5c5837bd60f018/asset-v1:MITx+15.480x+3T2021+type@asset+block/Unit_4a_-_Part_2.pdf" target="_blank">Unit 4a, Part 2</a>.</h3>
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